231886028 has 24 divisors (see below), whose sum is σ = 444347904. Its totient is φ = 105008400.

The previous prime is 231886021. The next prime is 231886049. The reversal of 231886028 is 820688132.

231886028 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 2×231886028² = 107542259963233568, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 231885982 and 231886000.

It is not an unprimeable number, because it can be changed into a prime (231886021) 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, 2201 + ... + 21647.

It is an arithmetic number, because the mean of its divisors is an integer number (18514496).

Almost surely, 2^231886028 is an apocalyptic number.

It is an amenable number.

231886028 is a deficient number, since it is larger than the sum of its proper divisors (212461876).

231886028 is a wasteful number, since it uses less digits than its factorization.

231886028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19733 (or 19731 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 38.

The square root of 231886028 is about 15227.8044379352. The cubic root of 231886028 is about 614.3627285141.

The spelling of 231886028 in words is "two hundred thirty-one million, eight hundred eighty-six thousand, twenty-eight".