322721904 has 80 divisors (see below), whose sum is σ = 872674304. Its totient is φ = 102643200.

The previous prime is 322721899. The next prime is 322721933. The reversal of 322721904 is 409127223.

322721904 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 107139 + ... + 110109.

Almost surely, 2^322721904 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 322721904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (436337152).

322721904 is an abundant number, since it is smaller than the sum of its proper divisors (549952400).

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

322721904 is a wasteful number, since it uses less digits than its factorization.

322721904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3086 (or 3080 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 322721904 is about 17964.4622519017. The cubic root of 322721904 is about 685.9242352158.

The spelling of 322721904 in words is "three hundred twenty-two million, seven hundred twenty-one thousand, nine hundred four".