86139408 has 40 divisors (see below), whose sum is σ = 235618848. Its totient is φ = 27023872.

The previous prime is 86139397. The next prime is 86139409. The reversal of 86139408 is 80493168.

It is a super-2 number, since 2×86139408² = 14839995221180928, which contains 22 as substring.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (86139409) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51966 + ... + 53597.

Almost surely, 2^86139408 is an apocalyptic number.

It is an amenable number.

86139408 is an abundant number, since it is smaller than the sum of its proper divisors (149479440).

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

86139408 is a wasteful number, since it uses less digits than its factorization.

86139408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105591 (or 105585 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 86139408 is about 9281.1318275305. The cubic root of 86139408 is about 441.6388743083.

The spelling of 86139408 in words is "eighty-six million, one hundred thirty-nine thousand, four hundred eight".