72856870 has 16 divisors (see below), whose sum is σ = 136844640. Its totient is φ = 27875584.

The previous prime is 72856859. The next prime is 72856897. The reversal of 72856870 is 7865827.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 158155 + ... + 158614.

It is an arithmetic number, because the mean of its divisors is an integer number (8552790).

Almost surely, 2^72856870 is an apocalyptic number.

72856870 is a deficient number, since it is larger than the sum of its proper divisors (63987770).

72856870 is a wasteful number, since it uses less digits than its factorization.

72856870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316799.

The product of its (nonzero) digits is 188160, while the sum is 43.

The square root of 72856870 is about 8535.6235858899. The cubic root of 72856870 is about 417.6605953464.

The spelling of 72856870 in words is "seventy-two million, eight hundred fifty-six thousand, eight hundred seventy".