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12930380 = 225646519
BaseRepresentation
bin110001010100…
…110101001100
3220022221010222
4301110311030
511302233010
61141050512
7214622621
oct61246514
926287128
1012930380
117331871
1243b6a38
1328a9618
141a08348
151206355
hexc54d4c

12930380 has 12 divisors (see below), whose sum is σ = 27153840. Its totient is φ = 5172144.

The previous prime is 12930371. The next prime is 12930389. The reversal of 12930380 is 8303921.

It is an interprime number because it is at equal distance from previous prime (12930371) and next prime (12930389).

It is not an unprimeable number, because it can be changed into a prime (12930389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 323240 + ... + 323279.

It is an arithmetic number, because the mean of its divisors is an integer number (2262820).

Almost surely, 212930380 is an apocalyptic number.

12930380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12930380 is an abundant number, since it is smaller than the sum of its proper divisors (14223460).

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

12930380 is a wasteful number, since it uses less digits than its factorization.

12930380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 646528 (or 646526 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 12930380 is about 3595.8837578542. The cubic root of 12930380 is about 234.7129738519.

The spelling of 12930380 in words is "twelve million, nine hundred thirty thousand, three hundred eighty".

Divisors: 1 2 4 5 10 20 646519 1293038 2586076 3232595 6465190 12930380