231905904 has 20 divisors (see below), whose sum is σ = 599090376. Its totient is φ = 77301952.

The previous prime is 231905873. The next prime is 231905911. The reversal of 231905904 is 409509132.

231905904 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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, 2415639 + ... + 2415734.

Almost surely, 2^231905904 is an apocalyptic number.

231905904 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

231905904 is an abundant number, since it is smaller than the sum of its proper divisors (367184472).

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

231905904 is a wasteful number, since it uses less digits than its factorization.

231905904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4831384 (or 4831378 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 33.

The square root of 231905904 is about 15228.4570459387. The cubic root of 231905904 is about 614.3802812818.

The spelling of 231905904 in words is "two hundred thirty-one million, nine hundred five thousand, nine hundred four".