72581118 has 16 divisors (see below), whose sum is σ = 145256976. Its totient is φ = 24177920.

The previous prime is 72581063. The next prime is 72581141. The reversal of 72581118 is 81118527.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9580 + ... + 15392.

It is an arithmetic number, because the mean of its divisors is an integer number (9078561).

Almost surely, 2^72581118 is an apocalyptic number.

72581118 is an abundant number, since it is smaller than the sum of its proper divisors (72675858).

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

72581118 is a wasteful number, since it uses less digits than its factorization.

72581118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7899.

The product of its digits is 4480, while the sum is 33.

The square root of 72581118 is about 8519.4552642760. The cubic root of 72581118 is about 417.1330022178.

The spelling of 72581118 in words is "seventy-two million, five hundred eighty-one thousand, one hundred eighteen".