72251870 has 32 divisors (see below), whose sum is σ = 144957600. Its totient is φ = 25767936.

The previous prime is 72251863. The next prime is 72251897. The reversal of 72251870 is 7815227.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7955 + ... + 14414.

It is an arithmetic number, because the mean of its divisors is an integer number (4529925).

Almost surely, 2^72251870 is an apocalyptic number.

72251870 is an abundant number, since it is smaller than the sum of its proper divisors (72705730).

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

72251870 is a wasteful number, since it uses less digits than its factorization.

72251870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22412.

The product of its (nonzero) digits is 7840, while the sum is 32.

The square root of 72251870 is about 8500.1099992882. The cubic root of 72251870 is about 416.5013025578.

The spelling of 72251870 in words is "seventy-two million, two hundred fifty-one thousand, eight hundred seventy".