231988864 has 32 divisors (see below), whose sum is σ = 478109700. Its totient is φ = 111992832.

The previous prime is 231988859. The next prime is 231988873. The reversal of 231988864 is 468889132.

It can be written as a sum of positive squares in 2 ways, for example, as 231283264 + 705600 = 15208^2 + 840^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27537 + ... + 34960.

Almost surely, 2^231988864 is an apocalyptic number.

It is an amenable number.

231988864 is an abundant number, since it is smaller than the sum of its proper divisors (246120836).

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

231988864 is an equidigital number, since it uses as much as digits as its factorization.

231988864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62540 (or 62528 counting only the distinct ones).

The product of its digits is 663552, while the sum is 49.

The square root of 231988864 is about 15231.1806502319. The cubic root of 231988864 is about 614.4535335660.

The spelling of 231988864 in words is "two hundred thirty-one million, nine hundred eighty-eight thousand, eight hundred sixty-four".