331979720 has 16 divisors (see below), whose sum is σ = 746954460. Its totient is φ = 132791872.

The previous prime is 331979719. The next prime is 331979771. The reversal of 331979720 is 27979133.

It can be written as a sum of positive squares in 2 ways, for example, as 331458436 + 521284 = 18206^2 + 722^2 .

It is a super-2 number, since 2×331979720² = 220421068982556800, which contains 22 as substring.

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, 4149707 + ... + 4149786.

Almost surely, 2^331979720 is an apocalyptic number.

It is an amenable number.

331979720 is an abundant number, since it is smaller than the sum of its proper divisors (414974740).

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

331979720 is a wasteful number, since it uses less digits than its factorization.

331979720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8299504 (or 8299500 counting only the distinct ones).

The product of its (nonzero) digits is 71442, while the sum is 41.

The square root of 331979720 is about 18220.3106449918. The cubic root of 331979720 is about 692.4214579866.

The spelling of 331979720 in words is "three hundred thirty-one million, nine hundred seventy-nine thousand, seven hundred twenty".