72897444 has 27 divisors (see below), whose sum is σ = 184398123. Its totient is φ = 24282072.

The previous prime is 72897431. The next prime is 72897491. The reversal of 72897444 is 44479827.

The square root of 72897444 is 8538.

It is a perfect power (a square), and thus also a powerful number.

It is a self number, because there is not a number n which added to its sum of digits gives 72897444.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 50517 + ... + 51939.

Almost surely, 2^72897444 is an apocalyptic number.

72897444 is the 8538-th square number.

It is an amenable number.

72897444 is an abundant number, since it is smaller than the sum of its proper divisors (111500679).

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

72897444 is a wasteful number, since it uses less digits than its factorization.

72897444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2856 (or 1428 counting only the distinct ones).

The product of its digits is 451584, while the sum is 45.

The cubic root of 72897444 is about 417.7381127043.

Multiplying 72897444 by its product of digits (451584), we get a square (32919319351296 = 5737536²).

The spelling of 72897444 in words is "seventy-two million, eight hundred ninety-seven thousand, four hundred forty-four".