331879520 has 96 divisors (see below), whose sum is σ = 900341568. Its totient is φ = 113246208.

The previous prime is 331879511. The next prime is 331879571. The reversal of 331879520 is 25978133.

It is a super-2 number, since 2×331879520² = 220288031590860800, which contains 22 as substring.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 287264 + ... + 288416.

It is an arithmetic number, because the mean of its divisors is an integer number (9378558).

Almost surely, 2^331879520 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 331879520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (450170784).

331879520 is an abundant number, since it is smaller than the sum of its proper divisors (568462048).

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

331879520 is a wasteful number, since it uses less digits than its factorization.

331879520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1432 (or 1424 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 331879520 is about 18217.5607587844. The cubic root of 331879520 is about 692.3517874541.

The spelling of 331879520 in words is "three hundred thirty-one million, eight hundred seventy-nine thousand, five hundred twenty".