109181864 has 16 divisors (see below), whose sum is σ = 223326720. Its totient is φ = 49628080.

The previous prime is 109181861. The next prime is 109181873. The reversal of 109181864 is 468181901.

It is not an unprimeable number, because it can be changed into a prime (109181861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 620264 + ... + 620439.

It is an arithmetic number, because the mean of its divisors is an integer number (13957920).

Almost surely, 2^109181864 is an apocalyptic number.

It is an amenable number.

109181864 is an abundant number, since it is smaller than the sum of its proper divisors (114144856).

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

109181864 is a wasteful number, since it uses less digits than its factorization.

109181864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1240720 (or 1240716 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 38.

The square root of 109181864 is about 10449.0125849288. The cubic root of 109181864 is about 477.9511396519.

The spelling of 109181864 in words is "one hundred nine million, one hundred eighty-one thousand, eight hundred sixty-four".