321890964 has 12 divisors (see below), whose sum is σ = 751078944. Its totient is φ = 107296984.

The previous prime is 321890917. The next prime is 321890969. The reversal of 321890964 is 469098123.

321890964 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×321890964² = 207227585409698592, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321890969) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13412112 + ... + 13412135.

It is an arithmetic number, because the mean of its divisors is an integer number (62589912).

Almost surely, 2^321890964 is an apocalyptic number.

It is an amenable number.

321890964 is an abundant number, since it is smaller than the sum of its proper divisors (429187980).

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

321890964 is a wasteful number, since it uses less digits than its factorization.

321890964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26824254 (or 26824252 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 42.

The square root of 321890964 is about 17941.3200183264. The cubic root of 321890964 is about 685.3350264114.

The spelling of 321890964 in words is "three hundred twenty-one million, eight hundred ninety thousand, nine hundred sixty-four".