72744554 has 8 divisors (see below), whose sum is σ = 109154628. Its totient is φ = 36359680.

The previous prime is 72744533. The next prime is 72744577. The reversal of 72744554 is 45544727.

It can be written as a sum of positive squares in 2 ways, for example, as 62331025 + 10413529 = 7895^2 + 3227^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

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, 4904 + ... + 13020.

Almost surely, 2^72744554 is an apocalyptic number.

72744554 is a deficient number, since it is larger than the sum of its proper divisors (36410074).

72744554 is a wasteful number, since it uses less digits than its factorization.

72744554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12600.

The product of its digits is 156800, while the sum is 38.

The square root of 72744554 is about 8529.0417984672. The cubic root of 72744554 is about 417.4458633953.

The spelling of 72744554 in words is "seventy-two million, seven hundred forty-four thousand, five hundred fifty-four".