72700506 has 24 divisors (see below), whose sum is σ = 162950580. Its totient is φ = 23397696.

The previous prime is 72700501. The next prime is 72700519. The reversal of 72700506 is 60500727.

It can be written as a sum of positive squares in 2 ways, for example, as 63059481 + 9641025 = 7941^2 + 3105^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 72700506.

It is not an unprimeable number, because it can be changed into a prime (72700501) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 69115 + ... + 70158.

Almost surely, 2^72700506 is an apocalyptic number.

72700506 is an abundant number, since it is smaller than the sum of its proper divisors (90250074).

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

72700506 is a wasteful number, since it uses less digits than its factorization.

72700506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139310 (or 139307 counting only the distinct ones).

The product of its (nonzero) digits is 2940, while the sum is 27.

The square root of 72700506 is about 8526.4591713090. The cubic root of 72700506 is about 417.3615896504.

The spelling of 72700506 in words is "seventy-two million, seven hundred thousand, five hundred six".