72944884 has 6 divisors (see below), whose sum is σ = 127653554. Its totient is φ = 36472440.

The previous prime is 72944881. The next prime is 72944897. The reversal of 72944884 is 48844927.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 69056100 + 3888784 = 8310^2 + 1972^2 .

It is a super-2 number, since 2×72944884² = 10641912203546912, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72944881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9118107 + ... + 9118114.

Almost surely, 2^72944884 is an apocalyptic number.

It is an amenable number.

72944884 is a deficient number, since it is larger than the sum of its proper divisors (54708670).

72944884 is a wasteful number, since it uses less digits than its factorization.

72944884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18236225 (or 18236223 counting only the distinct ones).

The product of its digits is 516096, while the sum is 46.

The square root of 72944884 is about 8540.7777163441. Note that the first 4 decimals coincide. The cubic root of 72944884 is about 417.8287112109.

The spelling of 72944884 in words is "seventy-two million, nine hundred forty-four thousand, eight hundred eighty-four".