231398528 has 32 divisors (see below), whose sum is σ = 461680560. Its totient is φ = 115525888.

The previous prime is 231398527. The next prime is 231398551. The reversal of 231398528 is 825893132.

231398528 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is not an unprimeable number, because it can be changed into a prime (231398527) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 151175 + ... + 152697.

Almost surely, 2^231398528 is an apocalyptic number.

It is an amenable number.

231398528 is a deficient number, since it is larger than the sum of its proper divisors (230282032).

231398528 is a wasteful number, since it uses less digits than its factorization.

231398528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2724 (or 2712 counting only the distinct ones).

The product of its digits is 103680, while the sum is 41.

The square root of 231398528 is about 15211.7891123957. The cubic root of 231398528 is about 613.9318962331.

The spelling of 231398528 in words is "two hundred thirty-one million, three hundred ninety-eight thousand, five hundred twenty-eight".