72904255 has 4 divisors (see below), whose sum is σ = 87485112. Its totient is φ = 58323400.

The previous prime is 72904217. The next prime is 72904259. The reversal of 72904255 is 55240927.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 72904255 - 2¹³ = 72896063 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72904255.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72904259) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7290421 + ... + 7290430.

It is an arithmetic number, because the mean of its divisors is an integer number (21871278).

Almost surely, 2^72904255 is an apocalyptic number.

72904255 is a deficient number, since it is larger than the sum of its proper divisors (14580857).

72904255 is a wasteful number, since it uses less digits than its factorization.

72904255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14580856.

The product of its (nonzero) digits is 25200, while the sum is 34.

The square root of 72904255 is about 8538.3988545863. The cubic root of 72904255 is about 417.7511224228.

The spelling of 72904255 in words is "seventy-two million, nine hundred four thousand, two hundred fifty-five".