72430656 has 56 divisors (see below), whose sum is σ = 192414144. Its totient is φ = 24046080.

The previous prime is 72430651. The next prime is 72430669. The reversal of 72430656 is 65603427.

It is not an unprimeable number, because it can be changed into a prime (72430651) 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, 59106 + ... + 60318.

Almost surely, 2^72430656 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 72430656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96207072).

72430656 is an abundant number, since it is smaller than the sum of its proper divisors (119983488).

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

72430656 is a wasteful number, since it uses less digits than its factorization.

72430656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1539 (or 1529 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 33.

The square root of 72430656 is about 8510.6201889169. The cubic root of 72430656 is about 416.8445613353.

The spelling of 72430656 in words is "seventy-two million, four hundred thirty thousand, six hundred fifty-six".