86172690 has 16 divisors (see below), whose sum is σ = 206814528. Its totient is φ = 22979376.

The previous prime is 86172689. The next prime is 86172703. The reversal of 86172690 is 9627168.

It is a super-2 number, since 2×86172690² = 14851465003672200, which contains 22 as substring.

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, 1436182 + ... + 1436241.

It is an arithmetic number, because the mean of its divisors is an integer number (12925908).

Almost surely, 2^86172690 is an apocalyptic number.

86172690 is an abundant number, since it is smaller than the sum of its proper divisors (120641838).

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

86172690 is a wasteful number, since it uses less digits than its factorization.

86172690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2872433.

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 86172690 is about 9282.9246468987. The cubic root of 86172690 is about 441.6957461966.

The spelling of 86172690 in words is "eighty-six million, one hundred seventy-two thousand, six hundred ninety".