72552728 has 16 divisors (see below), whose sum is σ = 136401000. Its totient is φ = 36179136.

The previous prime is 72552721. The next prime is 72552737. The reversal of 72552728 is 82725527.

It is a junction number, because it is equal to n+sod(n) for n = 72552691 and 72552700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72552721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8933 + ... + 14996.

Almost surely, 2^72552728 is an apocalyptic number.

It is an amenable number.

72552728 is a deficient number, since it is larger than the sum of its proper divisors (63848272).

72552728 is a wasteful number, since it uses less digits than its factorization.

72552728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24314 (or 24310 counting only the distinct ones).

The product of its digits is 78400, while the sum is 38.

The square root of 72552728 is about 8517.7889149708. The cubic root of 72552728 is about 417.0786081337.

The spelling of 72552728 in words is "seventy-two million, five hundred fifty-two thousand, seven hundred twenty-eight".