231886040 has 32 divisors (see below), whose sum is σ = 522575280. Its totient is φ = 92606592.

The previous prime is 231886021. The next prime is 231886049. The reversal of 231886040 is 40688132.

231886040 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×231886040² = 107542271093763200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 231885988 and 231886006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231886049) 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, 22799 + ... + 31361.

Almost surely, 2^231886040 is an apocalyptic number.

231886040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231886040 is an abundant number, since it is smaller than the sum of its proper divisors (290689240).

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

231886040 is a wasteful number, since it uses less digits than its factorization.

231886040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9251 (or 9247 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 231886040 is about 15227.8048319513. The cubic root of 231886040 is about 614.3627391118.

The spelling of 231886040 in words is "two hundred thirty-one million, eight hundred eighty-six thousand, forty".