331864384 has 14 divisors (see below), whose sum is σ = 658543514. Its totient is φ = 165932160.

The previous prime is 331864381. The next prime is 331864391. The reversal of 331864384 is 483468133.

It can be written as a sum of positive squares in only one way, i.e., 328624384 + 3240000 = 18128^2 + 1800^2 .

It is a super-2 number, since 2×331864384² = 220267938735398912, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331864381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2592627 + ... + 2592754.

Almost surely, 2^331864384 is an apocalyptic number.

It is an amenable number.

331864384 is a deficient number, since it is larger than the sum of its proper divisors (326679130).

331864384 is an equidigital number, since it uses as much as digits as its factorization.

331864384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5185393 (or 5185383 counting only the distinct ones).

The product of its digits is 165888, while the sum is 40.

The square root of 331864384 is about 18217.1453307043. The cubic root of 331864384 is about 692.3412619518.

The spelling of 331864384 in words is "three hundred thirty-one million, eight hundred sixty-four thousand, three hundred eighty-four".