72740044 has 12 divisors (see below), whose sum is σ = 137087104. Its totient is φ = 33572304.

The previous prime is 72740029. The next prime is 72740069. The reversal of 72740044 is 44004727.

It is a super-2 number, since 2×72740044² = 10582228002243872, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 72739994 and 72740021.

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, 699372 + ... + 699475.

Almost surely, 2^72740044 is an apocalyptic number.

It is an amenable number.

72740044 is a deficient number, since it is larger than the sum of its proper divisors (64347060).

72740044 is a wasteful number, since it uses less digits than its factorization.

72740044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1398864 (or 1398862 counting only the distinct ones).

The product of its (nonzero) digits is 6272, while the sum is 28.

The square root of 72740044 is about 8528.7774035907. Note that the first 3 decimals coincide. The cubic root of 72740044 is about 417.4372363131.

The spelling of 72740044 in words is "seventy-two million, seven hundred forty thousand, forty-four".