321923880 has 48 divisors (see below), whose sum is σ = 1046253780. Its totient is φ = 85846272.

The previous prime is 321923863. The next prime is 321923969. The reversal of 321923880 is 88329123.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 272052036 + 49871844 = 16494^2 + 7062^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

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 in 11 ways as a sum of consecutive naturals, for example, 446757 + ... + 447476.

Almost surely, 2^321923880 is an apocalyptic number.

321923880 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

321923880 is an abundant number, since it is smaller than the sum of its proper divisors (724329900).

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

321923880 is a wasteful number, since it uses less digits than its factorization.

321923880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 894250 (or 894243 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 321923880 is about 17942.2373186846. The cubic root of 321923880 is about 685.3583859973.

The spelling of 321923880 in words is "three hundred twenty-one million, nine hundred twenty-three thousand, eight hundred eighty".