1109995992 has 144 divisors (see below), whose sum is σ = 3513878160. Its totient is φ = 310082688.

The previous prime is 1109995987. The next prime is 1109996029. The reversal of 1109995992 is 2995999011.

It is a super-2 number, since 2×1109995992² = 2464182204512128128, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1112838 + ... + 1113834.

Almost surely, 2^1109995992 is an apocalyptic number.

1109995992 is a gapful number since it is divisible by the number (12) 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 1109995992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1756939080).

1109995992 is an abundant number, since it is smaller than the sum of its proper divisors (2403882168).

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

1109995992 is a wasteful number, since it uses less digits than its factorization.

1109995992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1110 (or 1056 counting only the distinct ones).

The product of its (nonzero) digits is 590490, while the sum is 54.

The square root of 1109995992 is about 33316.6023477785. The cubic root of 1109995992 is about 1035.3975592372.

The spelling of 1109995992 in words is "one billion, one hundred nine million, nine hundred ninety-five thousand, nine hundred ninety-two".