72722444 has 12 divisors (see below), whose sum is σ = 127406664. Its totient is φ = 36320544.

The previous prime is 72722411. The next prime is 72722471. The reversal of 72722444 is 44422727.

It is a super-2 number, since 2×72722444² = 10577107722666272, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 72722444.

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, 5954 + ... + 13449.

It is an arithmetic number, because the mean of its divisors is an integer number (10617222).

Almost surely, 2^72722444 is an apocalyptic number.

It is an amenable number.

72722444 is a deficient number, since it is larger than the sum of its proper divisors (54684220).

72722444 is a wasteful number, since it uses less digits than its factorization.

72722444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20344 (or 20342 counting only the distinct ones).

The product of its digits is 25088, while the sum is 32.

The square root of 72722444 is about 8527.7455402938. The cubic root of 72722444 is about 417.4035662391.

The spelling of 72722444 in words is "seventy-two million, seven hundred twenty-two thousand, four hundred forty-four".