331693928 has 16 divisors (see below), whose sum is σ = 633661380. Its totient is φ = 162717568.

The previous prime is 331693889. The next prime is 331693931. The reversal of 331693928 is 829396133.

331693928 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 262504804 + 69189124 = 16202^2 + 8318^2 .

It is a super-2 number, since 2×331693928² = 220041723744138368, 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, 390725 + ... + 391572.

Almost surely, 2^331693928 is an apocalyptic number.

It is an amenable number.

331693928 is a deficient number, since it is larger than the sum of its proper divisors (301967452).

331693928 is a wasteful number, since it uses less digits than its factorization.

331693928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 782356 (or 782352 counting only the distinct ones).

The product of its digits is 209952, while the sum is 44.

The square root of 331693928 is about 18212.4662799962. The cubic root of 331693928 is about 692.2227055587. Note that the first 3 decimals are identical.

It can be divided in two parts, 33 and 1693928, that added together give a palindrome (1693961).

The spelling of 331693928 in words is "three hundred thirty-one million, six hundred ninety-three thousand, nine hundred twenty-eight".