231689904 has 40 divisors (see below), whose sum is σ = 602013552. Its totient is φ = 76780800.

The previous prime is 231689897. The next prime is 231689921. The reversal of 231689904 is 409986132.

231689904 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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, 5647 + ... + 22254.

Almost surely, 2^231689904 is an apocalyptic number.

231689904 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

231689904 is an abundant number, since it is smaller than the sum of its proper divisors (370323648).

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

231689904 is a wasteful number, since it uses less digits than its factorization.

231689904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28085 (or 28079 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 42.

The square root of 231689904 is about 15221.3634080525. The cubic root of 231689904 is about 614.1894749228.

The spelling of 231689904 in words is "two hundred thirty-one million, six hundred eighty-nine thousand, nine hundred four".