86859816 has 16 divisors (see below), whose sum is σ = 217149600. Its totient is φ = 28953264.

The previous prime is 86859809. The next prime is 86859821. The reversal of 86859816 is 61895868.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1809556 + ... + 1809603.

It is an arithmetic number, because the mean of its divisors is an integer number (13571850).

Almost surely, 2^86859816 is an apocalyptic number.

It is an amenable number.

86859816 is an abundant number, since it is smaller than the sum of its proper divisors (130289784).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

86859816 is a wasteful number, since it uses less digits than its factorization.

86859816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3619168 (or 3619164 counting only the distinct ones).

The product of its digits is 829440, while the sum is 51.

The square root of 86859816 is about 9319.8613723596. The cubic root of 86859816 is about 442.8666411322.

The spelling of 86859816 in words is "eighty-six million, eight hundred fifty-nine thousand, eight hundred sixteen".