722458881 has 12 divisors (see below), whose sum is σ = 1057847908. Its totient is φ = 475041024.

The previous prime is 722458861. The next prime is 722458889. The reversal of 722458881 is 188854227.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 520250481 + 202208400 = 22809^2 + 14220^2 .

It is not a de Polignac number, because 722458881 - 2⁹ = 722458369 is a prime.

It is a super-2 number, since 2×722458881² = 1043893669471544322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (722458889) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 549160 + ... + 550473.

Almost surely, 2^722458881 is an apocalyptic number.

It is an amenable number.

722458881 is a deficient number, since it is larger than the sum of its proper divisors (335389027).

722458881 is a wasteful number, since it uses less digits than its factorization.

722458881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1099712 (or 1099709 counting only the distinct ones).

The product of its digits is 286720, while the sum is 45.

The square root of 722458881 is about 26878.5952199887. The cubic root of 722458881 is about 897.3000901214.

The spelling of 722458881 in words is "seven hundred twenty-two million, four hundred fifty-eight thousand, eight hundred eighty-one".