86218764 has 48 divisors (see below), whose sum is σ = 213954048. Its totient is φ = 26929408.

The previous prime is 86218763. The next prime is 86218799. The reversal of 86218764 is 46781268.

It is not an unprimeable number, because it can be changed into a prime (86218763) 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, 52849 + ... + 54455.

It is an arithmetic number, because the mean of its divisors is an integer number (4457376).

Almost surely, 2^86218764 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 86218764, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106977024).

86218764 is an abundant number, since it is smaller than the sum of its proper divisors (127735284).

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

86218764 is a wasteful number, since it uses less digits than its factorization.

86218764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1894 (or 1892 counting only the distinct ones).

The product of its digits is 129024, while the sum is 42.

The square root of 86218764 is about 9285.4059685078. The cubic root of 86218764 is about 441.7744527408.

The spelling of 86218764 in words is "eighty-six million, two hundred eighteen thousand, seven hundred sixty-four".