12656940 has 48 divisors (see below), whose sum is σ = 35655648. Its totient is φ = 3354624.

The previous prime is 12656939. The next prime is 12657011. The reversal of 12656940 is 4965621.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11034 + ... + 12126.

It is an arithmetic number, because the mean of its divisors is an integer number (742826).

Almost surely, 2^12656940 is an apocalyptic number.

12656940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12656940 is an abundant number, since it is smaller than the sum of its proper divisors (22998708).

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

12656940 is a wasteful number, since it uses less digits than its factorization.

12656940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1298 (or 1296 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 12656940 is about 3557.6593428826. The cubic root of 12656940 is about 233.0466729124.

The spelling of 12656940 in words is "twelve million, six hundred fifty-six thousand, nine hundred forty".