86172868 has 6 divisors (see below), whose sum is σ = 150802526. Its totient is φ = 43086432.

The previous prime is 86172829. The next prime is 86172887. The reversal of 86172868 is 86827168.

It can be written as a sum of positive squares in only one way, i.e., 61591104 + 24581764 = 7848^2 + 4958^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10771605 + ... + 10771612.

Almost surely, 2^86172868 is an apocalyptic number.

It is an amenable number.

86172868 is a deficient number, since it is larger than the sum of its proper divisors (64629658).

86172868 is a wasteful number, since it uses less digits than its factorization.

86172868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21543221 (or 21543219 counting only the distinct ones).

The product of its digits is 258048, while the sum is 46.

The square root of 86172868 is about 9282.9342343895. The cubic root of 86172868 is about 441.6960503215.

The spelling of 86172868 in words is "eighty-six million, one hundred seventy-two thousand, eight hundred sixty-eight".