721018896 has 60 divisors (see below), whose sum is σ = 2016955728. Its totient is φ = 221849472.

The previous prime is 721018877. The next prime is 721018913. The reversal of 721018896 is 698810127.

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 11 ways as a sum of consecutive naturals, for example, 36330 + ... + 52553.

Almost surely, 2^721018896 is an apocalyptic number.

It is an amenable number.

721018896 is an abundant number, since it is smaller than the sum of its proper divisors (1295936832).

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

721018896 is a wasteful number, since it uses less digits than its factorization.

721018896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88920 (or 88901 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 42.

The square root of 721018896 is about 26851.7950237968. The cubic root of 721018896 is about 896.7035357178.

It can be divided in two parts, 7210 and 18896, that added together give a triangular number (26106 = T₂₂₈).

The spelling of 721018896 in words is "seven hundred twenty-one million, eighteen thousand, eight hundred ninety-six".