1109915856 has 360 divisors, whose sum is σ = 4035545280. Its totient is φ = 282175488.

The previous prime is 1109915803. The next prime is 1109915861. The reversal of 1109915856 is 6585199011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 2278845 + ... + 2279331.

It is an arithmetic number, because the mean of its divisors is an integer number (11209848).

Almost surely, 2^1109915856 is an apocalyptic number.

1109915856 is a gapful number since it is divisible by the number (16) 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 1109915856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2017772640).

1109915856 is an abundant number, since it is smaller than the sum of its proper divisors (2925629424).

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

1109915856 is a wasteful number, since it uses less digits than its factorization.

1109915856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 551 (or 535 counting only the distinct ones).

The product of its (nonzero) digits is 97200, while the sum is 45.

The square root of 1109915856 is about 33315.3996824291. The cubic root of 1109915856 is about 1035.3726418452.

The spelling of 1109915856 in words is "one billion, one hundred nine million, nine hundred fifteen thousand, eight hundred fifty-six".