72904938 has 16 divisors (see below), whose sum is σ = 153484320. Its totient is φ = 23022576.

The previous prime is 72904933. The next prime is 72904969. The reversal of 72904938 is 83940927.

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 72904938.

It is not an unprimeable number, because it can be changed into a prime (72904933) 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, 319645 + ... + 319872.

It is an arithmetic number, because the mean of its divisors is an integer number (9592770).

Almost surely, 2^72904938 is an apocalyptic number.

72904938 is an abundant number, since it is smaller than the sum of its proper divisors (80579382).

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

72904938 is a wasteful number, since it uses less digits than its factorization.

72904938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 639541.

The product of its (nonzero) digits is 108864, while the sum is 42.

The square root of 72904938 is about 8538.4388502817. The cubic root of 72904938 is about 417.7524269791.

The spelling of 72904938 in words is "seventy-two million, nine hundred four thousand, nine hundred thirty-eight".