321308856 has 80 divisors (see below), whose sum is σ = 981798840. Its totient is φ = 97364160.

The previous prime is 321308849. The next prime is 321308863. The reversal of 321308856 is 658803123.

It is an interprime number because it is at equal distance from previous prime (321308849) and next prime (321308863).

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

It is a self number, because there is not a number n which added to its sum of digits gives 321308856.

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 19 ways as a sum of consecutive naturals, for example, 15411 + ... + 29666.

Almost surely, 2^321308856 is an apocalyptic number.

321308856 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

321308856 is an abundant number, since it is smaller than the sum of its proper divisors (660489984).

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

321308856 is a wasteful number, since it uses less digits than its factorization.

321308856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45106 (or 45093 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 321308856 is about 17925.0901252964. The cubic root of 321308856 is about 684.9216569078.

The spelling of 321308856 in words is "three hundred twenty-one million, three hundred eight thousand, eight hundred fifty-six".