72130224 has 40 divisors (see below), whose sum is σ = 186970672. Its totient is φ = 23961600.

The previous prime is 72130187. The next prime is 72130229. The reversal of 72130224 is 42203127.

It is a self number, because there is not a number n which added to its sum of digits gives 72130224.

It is not an unprimeable number, because it can be changed into a prime (72130229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12624 + ... + 17424.

Almost surely, 2^72130224 is an apocalyptic number.

It is an amenable number.

72130224 is an abundant number, since it is smaller than the sum of its proper divisors (114840448).

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

72130224 is a wasteful number, since it uses less digits than its factorization.

72130224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5125 (or 5119 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 72130224 is about 8492.9514304510. The cubic root of 72130224 is about 416.2674254354.

The spelling of 72130224 in words is "seventy-two million, one hundred thirty thousand, two hundred twenty-four".