86391108 has 18 divisors (see below), whose sum is σ = 218377614. Its totient is φ = 28797024.

The previous prime is 86391103. The next prime is 86391169. The reversal of 86391108 is 80119368.

86391108 is a `hidden beast` number, since 8 + 639 + 1 + 10 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 49449024 + 36942084 = 7032^2 + 6078^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 2399753 = 86391108 / (8 + 6 + 3 + 9 + 1 + 1 + 0 + 8).

It is not an unprimeable number, because it can be changed into a prime (86391101) by changing a digit.

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 in 5 ways as a sum of consecutive naturals, for example, 1199841 + ... + 1199912.

Almost surely, 2^86391108 is an apocalyptic number.

It is an amenable number.

86391108 is an abundant number, since it is smaller than the sum of its proper divisors (131986506).

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

86391108 is a wasteful number, since it uses less digits than its factorization.

86391108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2399763 (or 2399758 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 86391108 is about 9294.6817051473. The cubic root of 86391108 is about 442.0686133869.

The spelling of 86391108 in words is "eighty-six million, three hundred ninety-one thousand, one hundred eight".