72265818 has 16 divisors (see below), whose sum is σ = 147259296. Its totient is φ = 23634000.

The previous prime is 72265783. The next prime is 72265819. The reversal of 72265818 is 81856227.

It is not an unprimeable number, because it can be changed into a prime (72265819) 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, 113308 + ... + 113943.

It is an arithmetic number, because the mean of its divisors is an integer number (9203706).

Almost surely, 2^72265818 is an apocalyptic number.

72265818 is an abundant number, since it is smaller than the sum of its proper divisors (74993478).

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

72265818 is a wasteful number, since it uses less digits than its factorization.

72265818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227309.

The product of its digits is 53760, while the sum is 39.

The square root of 72265818 is about 8500.9304196658. The cubic root of 72265818 is about 416.5281022627.

The spelling of 72265818 in words is "seventy-two million, two hundred sixty-five thousand, eight hundred eighteen".