231604660 has 24 divisors (see below), whose sum is σ = 555851520. Its totient is φ = 79407264.

The previous prime is 231604621. The next prime is 231604697. The reversal of 231604660 is 66406132.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 827020 + ... + 827299.

It is an arithmetic number, because the mean of its divisors is an integer number (23160480).

Almost surely, 2^231604660 is an apocalyptic number.

231604660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231604660 is an abundant number, since it is smaller than the sum of its proper divisors (324246860).

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

231604660 is a wasteful number, since it uses less digits than its factorization.

231604660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1654335 (or 1654333 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 231604660 is about 15218.5630070648. The cubic root of 231604660 is about 614.1141409110.

The spelling of 231604660 in words is "two hundred thirty-one million, six hundred four thousand, six hundred sixty".