72904722 has 32 divisors (see below), whose sum is σ = 159382080. Its totient is φ = 22048320.

The previous prime is 72904697. The next prime is 72904723. The reversal of 72904722 is 22740927.

It is a super-3 number, since 3×72904722³ (a number of 25 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (72904723) 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, 50304 + ... + 51732.

It is an arithmetic number, because the mean of its divisors is an integer number (4980690).

Almost surely, 2^72904722 is an apocalyptic number.

72904722 is an abundant number, since it is smaller than the sum of its proper divisors (86477358).

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

72904722 is a wasteful number, since it uses less digits than its factorization.

72904722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2218.

The product of its (nonzero) digits is 14112, while the sum is 33.

The square root of 72904722 is about 8538.4262015901. The cubic root of 72904722 is about 417.7520144117.

The spelling of 72904722 in words is "seventy-two million, nine hundred four thousand, seven hundred twenty-two".