231478288 has 40 divisors (see below), whose sum is σ = 462057728. Its totient is φ = 112275072.

The previous prime is 231478283. The next prime is 231478297. The reversal of 231478288 is 882874132.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is not an unprimeable number, because it can be changed into a prime (231478283) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106945 + ... + 109087.

Almost surely, 2^231478288 is an apocalyptic number.

It is an amenable number.

231478288 is a deficient number, since it is larger than the sum of its proper divisors (230579440).

231478288 is a wasteful number, since it uses less digits than its factorization.

231478288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2351 (or 2345 counting only the distinct ones).

The product of its digits is 172032, while the sum is 43.

The square root of 231478288 is about 15214.4105373820. The cubic root of 231478288 is about 614.0024261877.

The spelling of 231478288 in words is "two hundred thirty-one million, four hundred seventy-eight thousand, two hundred eighty-eight".