331990842 has 32 divisors (see below), whose sum is σ = 692504064. Its totient is φ = 105984000.

The previous prime is 331990741. The next prime is 331990847. The reversal of 331990842 is 248099133.

331990842 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×331990842² = 220435838343737928, which contains 22 as substring.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 331990842.

It is not an unprimeable number, because it can be changed into a prime (331990847) 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, 8842 + ... + 27242.

It is an arithmetic number, because the mean of its divisors is an integer number (21640752).

Almost surely, 2^331990842 is an apocalyptic number.

331990842 is an abundant number, since it is smaller than the sum of its proper divisors (360513222).

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

331990842 is a wasteful number, since it uses less digits than its factorization.

331990842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18534.

The product of its (nonzero) digits is 46656, while the sum is 39.

The square root of 331990842 is about 18220.6158512823. The cubic root of 331990842 is about 692.4291904122.

The spelling of 331990842 in words is "three hundred thirty-one million, nine hundred ninety thousand, eight hundred forty-two".