86855664 has 40 divisors (see below), whose sum is σ = 256432000. Its totient is φ = 24815808.

The previous prime is 86855641. The next prime is 86855683. The reversal of 86855664 is 46655868.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

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, 128914 + ... + 129585.

It is an arithmetic number, because the mean of its divisors is an integer number (6410800).

Almost surely, 2^86855664 is an apocalyptic number.

86855664 is a gapful number since it is divisible by the number (84) formed by its first and last digit.

It is an amenable number.

86855664 is an abundant number, since it is smaller than the sum of its proper divisors (169576336).

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

86855664 is a wasteful number, since it uses less digits than its factorization.

86855664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258517 (or 258511 counting only the distinct ones).

The product of its digits is 1382400, while the sum is 48.

The square root of 86855664 is about 9319.6386196032. The cubic root of 86855664 is about 442.8595845066.

The spelling of 86855664 in words is "eighty-six million, eight hundred fifty-five thousand, six hundred sixty-four".