331656040 has 16 divisors (see below), whose sum is σ = 746226180. Its totient is φ = 132662400.

The previous prime is 331656037. The next prime is 331656041. The reversal of 331656040 is 40656133.

It can be written as a sum of positive squares in 2 ways, for example, as 330730596 + 925444 = 18186^2 + 962^2 .

It is not an unprimeable number, because it can be changed into a prime (331656041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4145661 + ... + 4145740.

Almost surely, 2^331656040 is an apocalyptic number.

It is an amenable number.

331656040 is an abundant number, since it is smaller than the sum of its proper divisors (414570140).

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

331656040 is a wasteful number, since it uses less digits than its factorization.

331656040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8291412 (or 8291408 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 28.

The square root of 331656040 is about 18211.4260836432. The cubic root of 331656040 is about 692.1963479940.

It can be divided in two parts, 3316560 and 40, that added together give a triangular number (3316600 = T₂₅₇₅).

The spelling of 331656040 in words is "three hundred thirty-one million, six hundred fifty-six thousand, forty".