393902312 has 16 divisors (see below), whose sum is σ = 740218500. Its totient is φ = 196510720.

The previous prime is 393902309. The next prime is 393902329. The reversal of 393902312 is 213209393.

It can be written as a sum of positive squares in 2 ways, for example, as 328841956 + 65060356 = 18134^2 + 8066^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51239 + ... + 58422.

Almost surely, 2^393902312 is an apocalyptic number.

It is an amenable number.

393902312 is a deficient number, since it is larger than the sum of its proper divisors (346316188).

393902312 is a wasteful number, since it uses less digits than its factorization.

393902312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110116 (or 110112 counting only the distinct ones).

The product of its (nonzero) digits is 8748, while the sum is 32.

The square root of 393902312 is about 19846.9723635622. The cubic root of 393902312 is about 733.0430996572.

The spelling of 393902312 in words is "three hundred ninety-three million, nine hundred two thousand, three hundred twelve".