86139798 has 16 divisors (see below), whose sum is σ = 172904880. Its totient is φ = 28609056.

The previous prime is 86139751. The next prime is 86139821. The reversal of 86139798 is 89793168.

It is a self number, because there is not a number n which added to its sum of digits gives 86139798.

It is a congruent number.

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, 24253 + ... + 27576.

It is an arithmetic number, because the mean of its divisors is an integer number (10806555).

Almost surely, 2^86139798 is an apocalyptic number.

86139798 is an abundant number, since it is smaller than the sum of its proper divisors (86765082).

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

86139798 is a wasteful number, since it uses less digits than its factorization.

86139798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52111.

The product of its digits is 653184, while the sum is 51.

The square root of 86139798 is about 9281.1528378753. The cubic root of 86139798 is about 441.6395408205.

The spelling of 86139798 in words is "eighty-six million, one hundred thirty-nine thousand, seven hundred ninety-eight".