232537640 has 16 divisors (see below), whose sum is σ = 523209780. Its totient is φ = 93015040.

The previous prime is 232537639. The next prime is 232537661. The reversal of 232537640 is 46735232.

It can be written as a sum of positive squares in 2 ways, for example, as 218862436 + 13675204 = 14794^2 + 3698^2 .

It is a junction number, because it is equal to n+sod(n) for n = 232537597 and 232537606.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2906681 + ... + 2906760.

Almost surely, 2^232537640 is an apocalyptic number.

232537640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

232537640 is an abundant number, since it is smaller than the sum of its proper divisors (290672140).

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

232537640 is a wasteful number, since it uses less digits than its factorization.

232537640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5813452 (or 5813448 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 32.

The square root of 232537640 is about 15249.1848962494. The cubic root of 232537640 is about 614.9376542435.

The spelling of 232537640 in words is "two hundred thirty-two million, five hundred thirty-seven thousand, six hundred forty".