86691198 has 32 divisors (see below), whose sum is σ = 189498240. Its totient is φ = 26220960.

The previous prime is 86691193. The next prime is 86691239. The reversal of 86691198 is 89119668.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86691191) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51108 + ... + 52776.

It is an arithmetic number, because the mean of its divisors is an integer number (5921820).

Almost surely, 2^86691198 is an apocalyptic number.

86691198 is an abundant number, since it is smaller than the sum of its proper divisors (102807042).

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

86691198 is a wasteful number, since it uses less digits than its factorization.

86691198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2472.

The product of its digits is 186624, while the sum is 48.

The square root of 86691198 is about 9310.8108132429. The cubic root of 86691198 is about 442.5798815217.

The spelling of 86691198 in words is "eighty-six million, six hundred ninety-one thousand, one hundred ninety-eight".