86919138 has 24 divisors (see below), whose sum is σ = 188515548. Its totient is φ = 28943712.

The previous prime is 86919127. The next prime is 86919143. The reversal of 86919138 is 83191968.

It can be written as a sum of positive squares in 2 ways, for example, as 56746089 + 30173049 = 7533^2 + 5493^2 .

It is a junction number, because it is equal to n+sod(n) for n = 86919093 and 86919102.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22956 + ... + 26472.

Almost surely, 2^86919138 is an apocalyptic number.

86919138 is an abundant number, since it is smaller than the sum of its proper divisors (101596410).

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

86919138 is a wasteful number, since it uses less digits than its factorization.

86919138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4898 (or 4895 counting only the distinct ones).

The product of its digits is 93312, while the sum is 45.

The square root of 86919138 is about 9323.0433872207. The cubic root of 86919138 is about 442.9674386298.

The spelling of 86919138 in words is "eighty-six million, nine hundred nineteen thousand, one hundred thirty-eight".