86909172 has 48 divisors (see below), whose sum is σ = 239756160. Its totient is φ = 23974272.

The previous prime is 86909161. The next prime is 86909177. The reversal of 86909172 is 27190968.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86909177) 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, 15403 + ... + 20274.

It is an arithmetic number, because the mean of its divisors is an integer number (4994920).

Almost surely, 2^86909172 is an apocalyptic number.

It is an amenable number.

86909172 is an abundant number, since it is smaller than the sum of its proper divisors (152846988).

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

86909172 is a wasteful number, since it uses less digits than its factorization.

86909172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35720 (or 35718 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 42.

The square root of 86909172 is about 9322.5088897785. The cubic root of 86909172 is about 442.9505080192.

The spelling of 86909172 in words is "eighty-six million, nine hundred nine thousand, one hundred seventy-two".