721446316 has 12 divisors (see below), whose sum is σ = 1266645688. Its totient is φ = 359547552.

The previous prime is 721446307. The next prime is 721446331. The reversal of 721446316 is 613644127.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 292521 + ... + 294976.

Almost surely, 2^721446316 is an apocalyptic number.

It is an amenable number.

721446316 is a deficient number, since it is larger than the sum of its proper divisors (545199372).

721446316 is a wasteful number, since it uses less digits than its factorization.

721446316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 587808 (or 587806 counting only the distinct ones).

The product of its digits is 24192, while the sum is 34.

The square root of 721446316 is about 26859.7527166577. The cubic root of 721446316 is about 896.8806893349.

The spelling of 721446316 in words is "seven hundred twenty-one million, four hundred forty-six thousand, three hundred sixteen".