396857538 has 48 divisors (see below), whose sum is σ = 1072034496. Its totient is φ = 103079520.

The previous prime is 396857471. The next prime is 396857551. The reversal of 396857538 is 835758693.

It is a happy number.

396857538 is a `hidden beast` number, since 3 + 9 + 68 + 575 + 3 + 8 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 141781 + ... + 144552.

It is an arithmetic number, because the mean of its divisors is an integer number (22334052).

Almost surely, 2^396857538 is an apocalyptic number.

396857538 is an abundant number, since it is smaller than the sum of its proper divisors (675176958).

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

396857538 is a wasteful number, since it uses less digits than its factorization.

396857538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286359 (or 286356 counting only the distinct ones).

The product of its digits is 5443200, while the sum is 54.

The square root of 396857538 is about 19921.2835429849. The cubic root of 396857538 is about 734.8717366076.

The spelling of 396857538 in words is "three hundred ninety-six million, eight hundred fifty-seven thousand, five hundred thirty-eight".