331639990 has 64 divisors (see below), whose sum is σ = 694241280. Its totient is φ = 112858240.

The previous prime is 331639937. The next prime is 331640009. The reversal of 331639990 is 99936133.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 117516 + ... + 120304.

It is an arithmetic number, because the mean of its divisors is an integer number (10847520).

Almost surely, 2^331639990 is an apocalyptic number.

331639990 is an abundant number, since it is smaller than the sum of its proper divisors (362601290).

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

331639990 is a wasteful number, since it uses less digits than its factorization.

331639990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2877.

The product of its (nonzero) digits is 118098, while the sum is 43.

The square root of 331639990 is about 18210.9854208936. The cubic root of 331639990 is about 692.1851818768.

The spelling of 331639990 in words is "three hundred thirty-one million, six hundred thirty-nine thousand, nine hundred ninety".