231883788 has 12 divisors (see below), whose sum is σ = 541062200. Its totient is φ = 77294592.

The previous prime is 231883763. The next prime is 231883789. The reversal of 231883788 is 887388132.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×231883788² = 107540182274457888, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (231883789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9661813 + ... + 9661836.

Almost surely, 2^231883788 is an apocalyptic number.

It is an amenable number.

231883788 is an abundant number, since it is smaller than the sum of its proper divisors (309178412).

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

231883788 is a wasteful number, since it uses less digits than its factorization.

231883788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19323656 (or 19323654 counting only the distinct ones).

The product of its digits is 516096, while the sum is 48.

The square root of 231883788 is about 15227.7308880870. The cubic root of 231883788 is about 614.3607502765.

The spelling of 231883788 in words is "two hundred thirty-one million, eight hundred eighty-three thousand, seven hundred eighty-eight".