72947528 has 32 divisors (see below), whose sum is σ = 144963000. Its totient is φ = 34352640.

The previous prime is 72947519. The next prime is 72947543. The reversal of 72947528 is 82574927.

It can be written as a sum of positive squares in 4 ways, for example, as 62694724 + 10252804 = 7918^2 + 3202^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5678 + ... + 13346.

Almost surely, 2^72947528 is an apocalyptic number.

It is an amenable number.

72947528 is a deficient number, since it is larger than the sum of its proper divisors (72015472).

72947528 is a wasteful number, since it uses less digits than its factorization.

72947528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7745 (or 7741 counting only the distinct ones).

The product of its digits is 282240, while the sum is 44.

The square root of 72947528 is about 8540.9325017822. The cubic root of 72947528 is about 417.8337594323.

The spelling of 72947528 in words is "seventy-two million, nine hundred forty-seven thousand, five hundred twenty-eight".