331390386 has 32 divisors (see below), whose sum is σ = 737899200. Its totient is φ = 110242080.

The previous prime is 331390363. The next prime is 331390421. The reversal of 331390386 is 683093133.

It is a self number, because there is not a number n which added to its sum of digits gives 331390386.

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, 22245 + ... + 34023.

It is an arithmetic number, because the mean of its divisors is an integer number (23059350).

Almost surely, 2^331390386 is an apocalyptic number.

331390386 is an abundant number, since it is smaller than the sum of its proper divisors (406508814).

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

331390386 is a wasteful number, since it uses less digits than its factorization.

331390386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12311 (or 12305 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 36.

The square root of 331390386 is about 18204.1310146900. The cubic root of 331390386 is about 692.0114839330.

It can be divided in two parts, 331390 and 386, that added together give a 4-th power (331776 = 24⁴).

The spelling of 331390386 in words is "three hundred thirty-one million, three hundred ninety thousand, three hundred eighty-six".