390831288 has 32 divisors (see below), whose sum is σ = 977802000. Its totient is φ = 130180608.

The previous prime is 390831263. The next prime is 390831293. The reversal of 390831288 is 882138093.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31920 + ... + 42432.

Almost surely, 2^390831288 is an apocalyptic number.

It is an amenable number.

390831288 is an abundant number, since it is smaller than the sum of its proper divisors (586970712).

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

390831288 is a wasteful number, since it uses less digits than its factorization.

390831288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12071 (or 12067 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 42.

The square root of 390831288 is about 19769.4534067080. The cubic root of 390831288 is about 731.1330923924.

The spelling of 390831288 in words is "three hundred ninety million, eight hundred thirty-one thousand, two hundred eighty-eight".