1109864 has 16 divisors (see below), whose sum is σ = 2378400. Its totient is φ = 475632.

The previous prime is 1109861. The next prime is 1109869. The reversal of 1109864 is 4689011.

It is not an unprimeable number, because it can be changed into a prime (1109861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9854 + ... + 9965.

It is an arithmetic number, because the mean of its divisors is an integer number (148650).

2^1109864 is an apocalyptic number.

1109864 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1109864 is an abundant number, since it is smaller than the sum of its proper divisors (1268536).

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

1109864 is a wasteful number, since it uses less digits than its factorization.

1109864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19832 (or 19828 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 1109864 is about 1053.5008305645. The cubic root of 1109864 is about 103.5356517163.

The spelling of 1109864 in words is "one million, one hundred nine thousand, eight hundred sixty-four".