72845216 has 24 divisors (see below), whose sum is σ = 148361220. Its totient is φ = 35166208.

The previous prime is 72845207. The next prime is 72845237. The reversal of 72845216 is 61254827.

It can be written as a sum of positive squares in 2 ways, for example, as 70896400 + 1948816 = 8420^2 + 1396^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38321 + ... + 40176.

Almost surely, 2^72845216 is an apocalyptic number.

It is an amenable number.

72845216 is an abundant number, since it is smaller than the sum of its proper divisors (75516004).

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

72845216 is a wasteful number, since it uses less digits than its factorization.

72845216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78536 (or 78528 counting only the distinct ones).

The product of its digits is 26880, while the sum is 35.

The square root of 72845216 is about 8534.9408902464. The cubic root of 72845216 is about 417.6383248493.

The spelling of 72845216 in words is "seventy-two million, eight hundred forty-five thousand, two hundred sixteen".