Numbers 30,000,000s

A page of the Numeropedia - the Special Encyclopedia of Numbers

31,000,00032,000,00033,000,00034,000,000

35,000,00036,000,00037,000,00038,000,00039,000,000

All Numbers  & [1M] & [10M- [20M] - [30M] - [40M] - [50M] - [60M] - [70M] - [80M] - [90M]  &  [100M]

1  - 10 - 100  - 1000 - 10,000 - 100,000 - 1M - 10M - 100M1B10B - 100B - 1T - 10T - 100T - 1Q ...

30,000,000

[Tech.]  Frequency Ranges.

 Range Names Uses 3 Hz - 300 Hz Extremely Low Frequency (ELF) Telegraph 300 Hz - 3 KHz Voice Frequency (VF) Telephone Circuitry 3 KHz - 30 KHz Very Low Frequency (VLF) High Fidelity 30 KHz- 300 KHz Low Frequency (LF) Maritime Mobile 300 KHz - 3 MHz Medium Frequency (MF) Navigational Radio, Land-maritime Mobile 3 MHz - 30 MHz High Frequency (HF) Maritime, Aeronautical, Amateur Radio 30 MHz - 300 MHz Very High Frequency (VHF) Maritime, Meteorological Communication, Television 300MHz - 3 GHz Ultra High Frequency (UHF) Television, Military, Low Range Radar 3 GHz - 30 GHz Super High Frequency (SHF) Space, Satellite, Microwave 30 GHz - 300 GHz Extremely High Frequency (EHF) Radio Astronomy

30,395,276

[Math.]  A pair of amicable numbers (24472180, 30395276).

30,402,457

[Math.]  A prime number. A Mersenne exponent: 230402457–1 is the 43rd Mersenne prime number.

30,724,694

[Math.]  A pair of amicable numbers (30724694, 32174506).

30,830,696

[Math.]  A pair of amicable numbers (30830696, 31652704).

30,969,225

[Math.]  Sum of the first 105 cube numbers:

13+23+…+1043+1053 = 30,969,225 = (1+2+…+104+105)2 = 55652.

xy,abc,def

[Math.]  For any xy = 10 to 99, there are always six 6-digit numbers abc,edf such that the sum (xy+abc,def) is equal to one of 6 digit-rotations of 142,857 and the number xy,abc,def is a multiple of 142,857.

For any xy = 10 to 99, there are always twelve 6-digit numbers abc,edf such that the sum (xy+abc,def) is equal to one of 12 digit-rotations of 076,923 or 153,846 and the number xy,abc,def is a multiple of 76,923.