86578715 has 16 divisors (see below), whose sum is σ = 105636096. Its totient is φ = 68112000.

The previous prime is 86578697. The next prime is 86578721. The reversal of 86578715 is 51787568.

It is a happy number.

It is not a de Polignac number, because 86578715 - 2¹² = 86574619 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 86578715.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86870 + ... + 87860.

It is an arithmetic number, because the mean of its divisors is an integer number (6602256).

Almost surely, 2^86578715 is an apocalyptic number.

86578715 is a deficient number, since it is larger than the sum of its proper divisors (19057381).

86578715 is a wasteful number, since it uses less digits than its factorization.

86578715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1270.

The product of its digits is 470400, while the sum is 47.

The square root of 86578715 is about 9304.7684012016. The cubic root of 86578715 is about 442.3883808821.

The spelling of 86578715 in words is "eighty-six million, five hundred seventy-eight thousand, seven hundred fifteen".