231937928 has 8 divisors (see below), whose sum is σ = 434883630. Its totient is φ = 115968960.

The previous prime is 231937913. The next prime is 231937949. The reversal of 231937928 is 829739132.

It is a happy number.

231937928 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 230493124 + 1444804 = 15182^2 + 1202^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14496113 + ... + 14496128.

Almost surely, 2^231937928 is an apocalyptic number.

It is an amenable number.

231937928 is a deficient number, since it is larger than the sum of its proper divisors (202945702).

231937928 is a wasteful number, since it uses less digits than its factorization.

231937928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28992247 (or 28992243 counting only the distinct ones).

The product of its digits is 163296, while the sum is 44.

The square root of 231937928 is about 15229.5084621927. The cubic root of 231937928 is about 614.4085600049.

The spelling of 231937928 in words is "two hundred thirty-one million, nine hundred thirty-seven thousand, nine hundred twenty-eight".