72799581 has 16 divisors (see below), whose sum is σ = 99382464. Its totient is φ = 47384064.

The previous prime is 72799553. The next prime is 72799589. The reversal of 72799581 is 18599727.

It is not a de Polignac number, because 72799581 - 2¹¹ = 72797533 is a prime.

It is a super-2 number, since 2×72799581² = 10599557987551122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 72799581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72799589) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35085 + ... + 37101.

It is an arithmetic number, because the mean of its divisors is an integer number (6211404).

Almost surely, 2^72799581 is an apocalyptic number.

It is an amenable number.

72799581 is a deficient number, since it is larger than the sum of its proper divisors (26582883).

72799581 is a wasteful number, since it uses less digits than its factorization.

72799581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2300.

The product of its digits is 317520, while the sum is 48.

The square root of 72799581 is about 8532.2670492666. The cubic root of 72799581 is about 417.5510946586.

The spelling of 72799581 in words is "seventy-two million, seven hundred ninety-nine thousand, five hundred eighty-one".