321406716 has 48 divisors (see below), whose sum is σ = 772059680. Its totient is φ = 103991040.

The previous prime is 321406711. The next prime is 321406721. The reversal of 321406716 is 617604123.

It is an interprime number because it is at equal distance from previous prime (321406711) and next prime (321406721).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321406711) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 314286 + ... + 315306.

Almost surely, 2^321406716 is an apocalyptic number.

It is an amenable number.

321406716 is an abundant number, since it is smaller than the sum of its proper divisors (450652964).

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

321406716 is a wasteful number, since it uses less digits than its factorization.

321406716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1774 (or 1772 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 321406716 is about 17927.8196108729. The cubic root of 321406716 is about 684.9911846416.

The spelling of 321406716 in words is "three hundred twenty-one million, four hundred six thousand, seven hundred sixteen".