72856291 has 8 divisors (see below), whose sum is σ = 74416320. Its totient is φ = 71303232.

The previous prime is 72856283. The next prime is 72856297. The reversal of 72856291 is 19265827.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 72856291 - 2³ = 72856283 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72856297) 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, 23055 + ... + 26023.

It is an arithmetic number, because the mean of its divisors is an integer number (9302040).

Almost surely, 2^72856291 is an apocalyptic number.

72856291 is a deficient number, since it is larger than the sum of its proper divisors (1560029).

72856291 is a wasteful number, since it uses less digits than its factorization.

72856291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3485.

The product of its digits is 60480, while the sum is 40.

The square root of 72856291 is about 8535.5896691441. The cubic root of 72856291 is about 417.6594889482.

The spelling of 72856291 in words is "seventy-two million, eight hundred fifty-six thousand, two hundred ninety-one".