231608404 has 12 divisors (see below), whose sum is σ = 426647200. Its totient is φ = 109709208.

The previous prime is 231608389. The next prime is 231608407. The reversal of 231608404 is 404806132.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231608407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1523664 + ... + 1523815.

Almost surely, 2^231608404 is an apocalyptic number.

It is an amenable number.

231608404 is a deficient number, since it is larger than the sum of its proper divisors (195038796).

231608404 is a wasteful number, since it uses less digits than its factorization.

231608404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3047502 (or 3047500 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 231608404 is about 15218.6860142392. The cubic root of 231608404 is about 614.1174500427.

The spelling of 231608404 in words is "two hundred thirty-one million, six hundred eight thousand, four hundred four".