331403394 has 16 divisors (see below), whose sum is σ = 757493568. Its totient is φ = 94686672.

The previous prime is 331403381. The next prime is 331403399. The reversal of 331403394 is 493304133.

It is not an unprimeable number, because it can be changed into a prime (331403399) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3945237 + ... + 3945320.

It is an arithmetic number, because the mean of its divisors is an integer number (47343348).

Almost surely, 2^331403394 is an apocalyptic number.

331403394 is an abundant number, since it is smaller than the sum of its proper divisors (426090174).

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

331403394 is a wasteful number, since it uses less digits than its factorization.

331403394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7890569.

The product of its (nonzero) digits is 11664, while the sum is 30.

The square root of 331403394 is about 18204.4882927261. The cubic root of 331403394 is about 692.0205382769.

The spelling of 331403394 in words is "three hundred thirty-one million, four hundred three thousand, three hundred ninety-four".