86643870 has 32 divisors (see below), whose sum is σ = 211872672. Its totient is φ = 22668672.

The previous prime is 86643859. The next prime is 86643877. The reversal of 86643870 is 7834668.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86643877) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25657 + ... + 28836.

It is an arithmetic number, because the mean of its divisors is an integer number (6621021).

Almost surely, 2^86643870 is an apocalyptic number.

86643870 is an abundant number, since it is smaller than the sum of its proper divisors (125228802).

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

86643870 is a wasteful number, since it uses less digits than its factorization.

86643870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54556.

The product of its (nonzero) digits is 193536, while the sum is 42.

The square root of 86643870 is about 9308.2689045816. The cubic root of 86643870 is about 442.4993265016.

The spelling of 86643870 in words is "eighty-six million, six hundred forty-three thousand, eight hundred seventy".