321402856 has 16 divisors (see below), whose sum is σ = 606241440. Its totient is φ = 159738480.

The previous prime is 321402847. The next prime is 321402857. The reversal of 321402856 is 658204123.

It is not an unprimeable number, because it can be changed into a prime (321402857) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 118950 + ... + 121621.

It is an arithmetic number, because the mean of its divisors is an integer number (37890090).

Almost surely, 2^321402856 is an apocalyptic number.

It is an amenable number.

321402856 is a deficient number, since it is larger than the sum of its proper divisors (284838584).

321402856 is a wasteful number, since it uses less digits than its factorization.

321402856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240744 (or 240740 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 321402856 is about 17927.7119566329. The cubic root of 321402856 is about 684.9884424498.

Adding to 321402856 its reverse (658204123), we get a palindrome (979606979).

The spelling of 321402856 in words is "three hundred twenty-one million, four hundred two thousand, eight hundred fifty-six".