86139136 has 36 divisors (see below), whose sum is σ = 182065212. Its totient is φ = 40534016.

The previous prime is 86139121. The next prime is 86139223. The reversal of 86139136 is 63193168.

It can be written as a sum of positive squares in 2 ways, for example, as 68161536 + 17977600 = 8256^2 + 4240^2 .

It is a junction number, because it is equal to n+sod(n) for n = 86139095 and 86139104.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5545 + ... + 14248.

It is an arithmetic number, because the mean of its divisors is an integer number (5057367).

Almost surely, 2^86139136 is an apocalyptic number.

It is an amenable number.

86139136 is an abundant number, since it is smaller than the sum of its proper divisors (95926076).

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

86139136 is a wasteful number, since it uses less digits than its factorization.

86139136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19826 (or 19812 counting only the distinct ones).

The product of its digits is 23328, while the sum is 37.

The square root of 86139136 is about 9281.1171741337. The cubic root of 86139136 is about 441.6384094576.

The spelling of 86139136 in words is "eighty-six million, one hundred thirty-nine thousand, one hundred thirty-six".