86591900 has 72 divisors (see below), whose sum is σ = 193945920. Its totient is φ = 33546240.

The previous prime is 86591899. The next prime is 86591909. The reversal of 86591900 is 919568.

It is a super-2 number, since 2×86591900² = 14996314291220000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86591909) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 766244 + ... + 766356.

Almost surely, 2^86591900 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 86591900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96972960).

86591900 is an abundant number, since it is smaller than the sum of its proper divisors (107354020).

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

86591900 is a wasteful number, since it uses less digits than its factorization.

86591900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303 (or 296 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 38.

The square root of 86591900 is about 9305.4768819228. The cubic root of 86591900 is about 442.4108367276.

The spelling of 86591900 in words is "eighty-six million, five hundred ninety-one thousand, nine hundred".