721085092 has 96 divisors (see below), whose sum is σ = 1604477952. Its totient is φ = 275982336.

The previous prime is 721085089. The next prime is 721085111. The reversal of 721085092 is 290580127.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1933018 + ... + 1933390.

It is an arithmetic number, because the mean of its divisors is an integer number (16713312).

Almost surely, 2^721085092 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 721085092, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (802238976).

721085092 is an abundant number, since it is smaller than the sum of its proper divisors (883392860).

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

721085092 is a wasteful number, since it uses less digits than its factorization.

721085092 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557 (or 555 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 721085092 is about 26853.0276132879. The cubic root of 721085092 is about 896.7309766865.

The spelling of 721085092 in words is "seven hundred twenty-one million, eighty-five thousand, ninety-two".