72855280 has 20 divisors (see below), whose sum is σ = 169388712. Its totient is φ = 29142080.

The previous prime is 72855271. The next prime is 72855359. The reversal of 72855280 is 8255827.

It is a tau number, because it is divible by the number of its divisors (20).

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, 455266 + ... + 455425.

Almost surely, 2^72855280 is an apocalyptic number.

It is an amenable number.

72855280 is an abundant number, since it is smaller than the sum of its proper divisors (96533432).

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

72855280 is a wasteful number, since it uses less digits than its factorization.

72855280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 910704 (or 910698 counting only the distinct ones).

The product of its (nonzero) digits is 44800, while the sum is 37.

The square root of 72855280 is about 8535.5304463167. The cubic root of 72855280 is about 417.6575570368.

The spelling of 72855280 in words is "seventy-two million, eight hundred fifty-five thousand, two hundred eighty".