322666728 has 32 divisors (see below), whose sum is σ = 810297600. Its totient is φ = 107071488.

The previous prime is 322666727. The next prime is 322666753. The reversal of 322666728 is 827666223.

It is a super-2 number, since 2×322666728² = 208227634716451968, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 322666728.

It is not an unprimeable number, because it can be changed into a prime (322666727) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 24793 + ... + 35496.

It is an arithmetic number, because the mean of its divisors is an integer number (25321800).

Almost surely, 2^322666728 is an apocalyptic number.

It is an amenable number.

322666728 is an abundant number, since it is smaller than the sum of its proper divisors (487630872).

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

322666728 is a wasteful number, since it uses less digits than its factorization.

322666728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60521 (or 60517 counting only the distinct ones).

The product of its digits is 290304, while the sum is 42.

The square root of 322666728 is about 17962.9264876300. The cubic root of 322666728 is about 685.8851419984.

The spelling of 322666728 in words is "three hundred twenty-two million, six hundred sixty-six thousand, seven hundred twenty-eight".