72251380 has 48 divisors (see below), whose sum is σ = 157046400. Its totient is φ = 27900288.

The previous prime is 72251371. The next prime is 72251401. The reversal of 72251380 is 8315227.

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, 120321 + ... + 120919.

It is an arithmetic number, because the mean of its divisors is an integer number (3271800).

Almost surely, 2^72251380 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 72251380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78523200).

72251380 is an abundant number, since it is smaller than the sum of its proper divisors (84795020).

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

72251380 is a wasteful number, since it uses less digits than its factorization.

72251380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 808 (or 806 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 72251380 is about 8500.0811760830. The cubic root of 72251380 is about 416.5003610084.

The spelling of 72251380 in words is "seventy-two million, two hundred fifty-one thousand, three hundred eighty".