321992992 has 12 divisors (see below), whose sum is σ = 633923766. Its totient is φ = 160996480.

The previous prime is 321992977. The next prime is 321993013. The reversal of 321992992 is 299299123.

It can be written as a sum of positive squares in only one way, i.e., 258695056 + 63297936 = 16084^2 + 7956^2 .

It is a super-2 number, since 2×321992992² = 207358973794224128, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5031109 + ... + 5031172.

Almost surely, 2^321992992 is an apocalyptic number.

321992992 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

321992992 is a deficient number, since it is larger than the sum of its proper divisors (311930774).

321992992 is a wasteful number, since it uses less digits than its factorization.

321992992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10062291 (or 10062283 counting only the distinct ones).

The product of its digits is 157464, while the sum is 46.

The square root of 321992992 is about 17944.1631735782. The cubic root of 321992992 is about 685.4074277144.

The spelling of 321992992 in words is "three hundred twenty-one million, nine hundred ninety-two thousand, nine hundred ninety-two".