331920846 has 12 divisors (see below), whose sum is σ = 719161872. Its totient is φ = 110640276.

The previous prime is 331920839. The next prime is 331920847. The reversal of 331920846 is 648029133.

It is a super-2 number, since 2×331920846² = 220342896018711432, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 331920846.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331920847) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9220006 + ... + 9220041.

It is an arithmetic number, because the mean of its divisors is an integer number (59930156).

Almost surely, 2^331920846 is an apocalyptic number.

331920846 is an abundant number, since it is smaller than the sum of its proper divisors (387241026).

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

331920846 is a wasteful number, since it uses less digits than its factorization.

331920846 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18440055 (or 18440052 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 331920846 is about 18218.6949587505. The cubic root of 331920846 is about 692.3805237281.

Adding to 331920846 its reverse (648029133), we get a palindrome (979949979).

The spelling of 331920846 in words is "three hundred thirty-one million, nine hundred twenty thousand, eight hundred forty-six".