321071868 has 36 divisors (see below), whose sum is σ = 874030248. Its totient is φ = 98791200.

The previous prime is 321071851. The next prime is 321071873. The reversal of 321071868 is 868170123.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 342558 + ... + 343493.

It is an arithmetic number, because the mean of its divisors is an integer number (24278618).

Almost surely, 2^321071868 is an apocalyptic number.

It is an amenable number.

321071868 is an abundant number, since it is smaller than the sum of its proper divisors (552958380).

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

321071868 is a wasteful number, since it uses less digits than its factorization.

321071868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 686074 (or 686069 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 321071868 is about 17918.4783952210. The cubic root of 321071868 is about 684.7532227734.

It can be divided in two parts, 3210 and 71868, that added together give a triangular number (75078 = T₃₈₇).

The spelling of 321071868 in words is "three hundred twenty-one million, seventy-one thousand, eight hundred sixty-eight".