12705988 has 12 divisors (see below), whose sum is σ = 22276800. Its totient is φ = 6341192.

The previous prime is 12705983. The next prime is 12705991. The reversal of 12705988 is 88950721.

It is a super-2 number, since 2×12705988² = 322884262112288, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12705988.

It is not an unprimeable number, because it can be changed into a prime (12705983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 256 + ... + 5047.

It is an arithmetic number, because the mean of its divisors is an integer number (1856400).

Almost surely, 2^12705988 is an apocalyptic number.

It is an amenable number.

12705988 is a deficient number, since it is larger than the sum of its proper divisors (9570812).

12705988 is a wasteful number, since it uses less digits than its factorization.

12705988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5906 (or 5904 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 40.

The square root of 12705988 is about 3564.5459738934. The cubic root of 12705988 is about 233.3473179827.

The spelling of 12705988 in words is "twelve million, seven hundred five thousand, nine hundred eighty-eight".