86691708 has 36 divisors (see below), whose sum is σ = 227256120. Its totient is φ = 28896912.

The previous prime is 86691707. The next prime is 86691719. The reversal of 86691708 is 80719668.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86691707) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43623 + ... + 45566.

It is an arithmetic number, because the mean of its divisors is an integer number (6312670).

Almost surely, 2^86691708 is an apocalyptic number.

It is an amenable number.

86691708 is an abundant number, since it is smaller than the sum of its proper divisors (140564412).

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

86691708 is a wasteful number, since it uses less digits than its factorization.

86691708 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89208 (or 89194 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 86691708 is about 9310.8382007207. The cubic root of 86691708 is about 442.5807494118.

The spelling of 86691708 in words is "eighty-six million, six hundred ninety-one thousand, seven hundred eight".