331685420 has 48 divisors (see below), whose sum is σ = 761177088. Its totient is φ = 120404160.

The previous prime is 331685381. The next prime is 331685429. The reversal of 331685420 is 24586133.

It is a super-2 number, since 2×331685420² = 220030435681152800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (331685429) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 188987 + ... + 190733.

It is an arithmetic number, because the mean of its divisors is an integer number (15857856).

Almost surely, 2^331685420 is an apocalyptic number.

It is an amenable number.

331685420 is an abundant number, since it is smaller than the sum of its proper divisors (429491668).

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

331685420 is a wasteful number, since it uses less digits than its factorization.

331685420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2630 (or 2628 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 331685420 is about 18212.2327022252. The cubic root of 331685420 is about 692.2167869687.

The spelling of 331685420 in words is "three hundred thirty-one million, six hundred eighty-five thousand, four hundred twenty".