8109864 has 48 divisors (see below), whose sum is σ = 25103520. Its totient is φ = 2316960.

The previous prime is 8109859. The next prime is 8109883. The reversal of 8109864 is 4689018.

It is a happy number.

It is a Smith number, since the sum of its digits (36) 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 (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7542 + ... + 8549.

It is an arithmetic number, because the mean of its divisors is an integer number (522990).

Almost surely, 2^8109864 is an apocalyptic number.

8109864 is a gapful number since it is divisible by the number (84) formed by its first and last digit.

It is an amenable number.

8109864 is an abundant number, since it is smaller than the sum of its proper divisors (16993656).

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

8109864 is a wasteful number, since it uses less digits than its factorization.

8109864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16110 (or 16103 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 8109864 is about 2847.7822950500. The cubic root of 8109864 is about 200.9113740121.

The spelling of 8109864 in words is "eight million, one hundred nine thousand, eight hundred sixty-four".