72249570 has 80 divisors (see below), whose sum is σ = 195706368. Its totient is φ = 19124640.

The previous prime is 72249539. The next prime is 72249581. The reversal of 72249570 is 7594227.

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, 154477 + ... + 154943.

Almost surely, 2^72249570 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 72249570, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97853184).

72249570 is an abundant number, since it is smaller than the sum of its proper divisors (123456798).

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

72249570 is a wasteful number, since it uses less digits than its factorization.

72249570 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 677 (or 668 counting only the distinct ones).

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

The square root of 72249570 is about 8499.9747058447. The cubic root of 72249570 is about 416.4968830036.

The spelling of 72249570 in words is "seventy-two million, two hundred forty-nine thousand, five hundred seventy".