1109812860 has 144 divisors (see below), whose sum is σ = 3739085280. Its totient is φ = 273162240.

The previous prime is 1109812849. The next prime is 1109812867. The reversal of 1109812860 is 682189011.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1109812867) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 85180 + ... + 97340.

It is an arithmetic number, because the mean of its divisors is an integer number (25965870).

Almost surely, 2^1109812860 is an apocalyptic number.

1109812860 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 1109812860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1869542640).

1109812860 is an abundant number, since it is smaller than the sum of its proper divisors (2629272420).

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

1109812860 is a wasteful number, since it uses less digits than its factorization.

1109812860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12205 (or 12184 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 36.

The square root of 1109812860 is about 33313.8538749272. The cubic root of 1109812860 is about 1035.3406146308.

The spelling of 1109812860 in words is "one billion, one hundred nine million, eight hundred twelve thousand, eight hundred sixty".