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12120002980 = 22538910311511
BaseRepresentation
bin10110100100110100…
…01001000110100100
31011021122220221111021
423102122021012210
5144310210043410
65322353420524
7606226216441
oct132232110644
934248827437
1012120002980
11515a475698
122422b6a744
1311b1c8cbc7
1482d9389c8
154ae076eda
hex2d26891a4

12120002980 has 48 divisors (see below), whose sum is σ = 25559089920. Its totient is φ = 4827651200.

The previous prime is 12120002969. The next prime is 12120002987. The reversal of 12120002980 is 8920002121.

It is not an unprimeable number, because it can be changed into a prime (12120002987) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8020425 + ... + 8021935.

It is an arithmetic number, because the mean of its divisors is an integer number (532481040).

Almost surely, 212120002980 is an apocalyptic number.

12120002980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12120002980 is an abundant number, since it is smaller than the sum of its proper divisors (13439086940).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12120002980 is a wasteful number, since it uses less digits than its factorization.

12120002980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2940 (or 2938 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 25.

The spelling of 12120002980 in words is "twelve billion, one hundred twenty million, two thousand, nine hundred eighty".

Divisors: 1 2 4 5 10 20 389 778 1031 1511 1556 1945 2062 3022 3890 4124 5155 6044 7555 7780 10310 15110 20620 30220 401059 587779 802118 1175558 1557841 1604236 2005295 2351116 2938895 3115682 4010590 5877790 6231364 7789205 8021180 11755580 15578410 31156820 606000149 1212000298 2424000596 3030000745 6060001490 12120002980