72216528 has 40 divisors (see below), whose sum is σ = 190086048. Its totient is φ = 23617152.

The previous prime is 72216523. The next prime is 72216541. The reversal of 72216528 is 82561227.

It is a super-5 number, since 5×72216528⁵ (a number of 40 digits) contains 55555 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72216523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11650 + ... + 16737.

Almost surely, 2^72216528 is an apocalyptic number.

It is an amenable number.

72216528 is an abundant number, since it is smaller than the sum of its proper divisors (117869520).

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

72216528 is a wasteful number, since it uses less digits than its factorization.

72216528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28451 (or 28445 counting only the distinct ones).

The product of its digits is 13440, while the sum is 33.

The square root of 72216528 is about 8498.0308307278. The cubic root of 72216528 is about 416.4333809488.

The spelling of 72216528 in words is "seventy-two million, two hundred sixteen thousand, five hundred twenty-eight".