12857992 has 24 divisors (see below), whose sum is σ = 28045710. Its totient is φ = 5510400.

The previous prime is 12857983. The next prime is 12858017. The reversal of 12857992 is 29975821.

It can be written as a sum of positive squares in only one way, i.e., 12348196 + 509796 = 3514^2 + 714^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16009 + ... + 16792.

Almost surely, 2^12857992 is an apocalyptic number.

It is an amenable number.

12857992 is an abundant number, since it is smaller than the sum of its proper divisors (15187718).

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

12857992 is a wasteful number, since it uses less digits than its factorization.

12857992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32821 (or 32810 counting only the distinct ones).

The product of its digits is 90720, while the sum is 43.

The square root of 12857992 is about 3585.8042333624. The cubic root of 12857992 is about 234.2741569608.

The spelling of 12857992 in words is "twelve million, eight hundred fifty-seven thousand, nine hundred ninety-two".