72856895 has 4 divisors (see below), whose sum is σ = 87428280. Its totient is φ = 58285512.

The previous prime is 72856859. The next prime is 72856897. The reversal of 72856895 is 59865827.

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

It is a cyclic number.

It is not a de Polignac number, because 72856895 - 2⁶ = 72856831 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72856897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7285685 + ... + 7285694.

It is an arithmetic number, because the mean of its divisors is an integer number (21857070).

Almost surely, 2^72856895 is an apocalyptic number.

72856895 is a deficient number, since it is larger than the sum of its proper divisors (14571385).

72856895 is a wasteful number, since it uses less digits than its factorization.

72856895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14571384.

The product of its digits is 1209600, while the sum is 50.

The square root of 72856895 is about 8535.6250503405. The cubic root of 72856895 is about 417.6606431182.

The spelling of 72856895 in words is "seventy-two million, eight hundred fifty-six thousand, eight hundred ninety-five".