321392672 has 12 divisors (see below), whose sum is σ = 632741886. Its totient is φ = 160696320.

The previous prime is 321392623. The next prime is 321392681. The reversal of 321392672 is 276293123.

It can be written as a sum of positive squares in only one way, i.e., 207244816 + 114147856 = 14396^2 + 10684^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5021729 + ... + 5021792.

Almost surely, 2^321392672 is an apocalyptic number.

321392672 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

321392672 is a deficient number, since it is larger than the sum of its proper divisors (311349214).

321392672 is a wasteful number, since it uses less digits than its factorization.

321392672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10043531 (or 10043523 counting only the distinct ones).

The product of its digits is 27216, while the sum is 35.

The square root of 321392672 is about 17927.4279248307. The cubic root of 321392672 is about 684.9812075048.

The spelling of 321392672 in words is "three hundred twenty-one million, three hundred ninety-two thousand, six hundred seventy-two".