72554544 has 30 divisors (see below), whose sum is σ = 203052356. Its totient is φ = 24184800.

The previous prime is 72554527. The next prime is 72554551. The reversal of 72554544 is 44545527.

It is a happy number.

72554544 is a `hidden beast` number, since 72 + 5 + 545 + 44 = 666.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 72554499 and 72554508.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 251782 + ... + 252069.

Almost surely, 2^72554544 is an apocalyptic number.

It is an amenable number.

72554544 is an abundant number, since it is smaller than the sum of its proper divisors (130497812).

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

72554544 is a wasteful number, since it uses less digits than its factorization.

72554544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 503865 (or 503856 counting only the distinct ones).

The product of its digits is 112000, while the sum is 36.

The square root of 72554544 is about 8517.8955147384. The cubic root of 72554544 is about 417.0820879405.

The spelling of 72554544 in words is "seventy-two million, five hundred fifty-four thousand, five hundred forty-four".