86638686 has 8 divisors (see below), whose sum is σ = 173277384. Its totient is φ = 28879560.

The previous prime is 86638667. The next prime is 86638703. The reversal of 86638686 is 68683668.

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

86638686 is an admirable number.

It is a congruent number.

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, 7219885 + ... + 7219896.

It is an arithmetic number, because the mean of its divisors is an integer number (21659673).

Almost surely, 2^86638686 is an apocalyptic number.

86638686 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

86638686 is a wasteful number, since it uses less digits than its factorization.

86638686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14439786.

The product of its digits is 1990656, while the sum is 51.

The square root of 86638686 is about 9307.9904383277. The cubic root of 86638686 is about 442.4905012484.

The spelling of 86638686 in words is "eighty-six million, six hundred thirty-eight thousand, six hundred eighty-six".