72547528 has 32 divisors (see below), whose sum is σ = 140801400. Its totient is φ = 35016192.

The previous prime is 72547511. The next prime is 72547547. The reversal of 72547528 is 82574527.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 70862724 + 1684804 = 8418^2 + 1298^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39658 + ... + 41446.

Almost surely, 2^72547528 is an apocalyptic number.

It is an amenable number.

72547528 is a deficient number, since it is larger than the sum of its proper divisors (68253872).

72547528 is a wasteful number, since it uses less digits than its factorization.

72547528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1969 (or 1965 counting only the distinct ones).

The product of its digits is 156800, while the sum is 40.

The square root of 72547528 is about 8517.4836659661. The cubic root of 72547528 is about 417.0686436080.

It can be divided in two parts, 72 and 547528, that added together give a square (547600 = 740²).

The spelling of 72547528 in words is "seventy-two million, five hundred forty-seven thousand, five hundred twenty-eight".