86868558 has 64 divisors (see below), whose sum is σ = 223488000. Its totient is φ = 24496992.

The previous prime is 86868527. The next prime is 86868559. The reversal of 86868558 is 85586868.

86868558 is a `hidden beast` number, since 8 + 6 + 86 + 8 + 558 = 666.

It is a super-2 number, since 2×86868558² = 15092292737998728, which contains 22 as substring.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86868559) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28408 + ... + 31316.

It is an arithmetic number, because the mean of its divisors is an integer number (3492000).

Almost surely, 2^86868558 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 86868558, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111744000).

86868558 is an abundant number, since it is smaller than the sum of its proper divisors (136619442).

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

86868558 is a wasteful number, since it uses less digits than its factorization.

86868558 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3006 (or 3000 counting only the distinct ones).

The product of its digits is 3686400, while the sum is 54.

The square root of 86868558 is about 9320.3303589519. The cubic root of 86868558 is about 442.8814980610.

The spelling of 86868558 in words is "eighty-six million, eight hundred sixty-eight thousand, five hundred fifty-eight".