1109808100 has 72 divisors (see below), whose sum is σ = 2479716288. Its totient is φ = 430953600.

The previous prime is 1109808097. The next prime is 1109808101. The reversal of 1109808100 is 18089011.

It is a super-2 number, since 2×1109808100² = 2463348037651220000, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1109808101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 474534 + ... + 476866.

It is an arithmetic number, because the mean of its divisors is an integer number (34440504).

Almost surely, 2^1109808100 is an apocalyptic number.

1109808100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1109808100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1239858144).

1109808100 is an abundant number, since it is smaller than the sum of its proper divisors (1369908188).

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

1109808100 is a wasteful number, since it uses less digits than its factorization.

1109808100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2485 (or 2478 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 28.

The square root of 1109808100 is about 33313.7824331012. The cubic root of 1109808100 is about 1035.3391344328.

The spelling of 1109808100 in words is "one billion, one hundred nine million, eight hundred eight thousand, one hundred".