1109816 has 8 divisors (see below), whose sum is σ = 2080920. Its totient is φ = 554904.

The previous prime is 1109813. The next prime is 1109821. The reversal of 1109816 is 6189011.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1109813) 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 as a sum of consecutive naturals, namely, 69356 + ... + 69371.

It is an arithmetic number, because the mean of its divisors is an integer number (260115).

2^1109816 is an apocalyptic number.

It is an amenable number.

1109816 is a deficient number, since it is larger than the sum of its proper divisors (971104).

1109816 is a wasteful number, since it uses less digits than its factorization.

1109816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138733 (or 138729 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 26.

The square root of 1109816 is about 1053.4780491306. The cubic root of 1109816 is about 103.5341591062.

The spelling of 1109816 in words is "one million, one hundred nine thousand, eight hundred sixteen".