72457902 has 80 divisors (see below), whose sum is σ = 179867952. Its totient is φ = 21617280.

The previous prime is 72457883. The next prime is 72457949. The reversal of 72457902 is 20975427.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 129808 + ... + 130364.

Almost surely, 2^72457902 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 72457902, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89933976).

72457902 is an abundant number, since it is smaller than the sum of its proper divisors (107410050).

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

72457902 is a wasteful number, since it uses less digits than its factorization.

72457902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 655 (or 646 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 36.

The square root of 72457902 is about 8512.2207443181. The cubic root of 72457902 is about 416.8968224623.

The spelling of 72457902 in words is "seventy-two million, four hundred fifty-seven thousand, nine hundred two".