72180528 has 60 divisors (see below), whose sum is σ = 216916920. Its totient is φ = 20622336.

The previous prime is 72180527. The next prime is 72180533. The reversal of 72180528 is 82508127.

It is not an unprimeable number, because it can be changed into a prime (72180527) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 12993 + ... + 17696.

It is an arithmetic number, because the mean of its divisors is an integer number (3615282).

Almost surely, 2^72180528 is an apocalyptic number.

It is an amenable number.

72180528 is an abundant number, since it is smaller than the sum of its proper divisors (144736392).

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

72180528 is a wasteful number, since it uses less digits than its factorization.

72180528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30714 (or 30701 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 33.

The square root of 72180528 is about 8495.9124289272. The cubic root of 72180528 is about 416.3641719836.

The spelling of 72180528 in words is "seventy-two million, one hundred eighty thousand, five hundred twenty-eight".