1112991840 has 240 divisors, whose sum is σ = 3960178992. Its totient is φ = 294368256.

The previous prime is 1112991829. The next prime is 1112991877. The reversal of 1112991840 is 481992111.

It is a tau number, because it is divible by the number of its divisors (240).

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

It is a junction number, because it is equal to n+sod(n) for n = 1112991795 and 1112991804.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2034447 + ... + 2034993.

Almost surely, 2^1112991840 is an apocalyptic number.

1112991840 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 1112991840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1980089496).

1112991840 is an abundant number, since it is smaller than the sum of its proper divisors (2847187152).

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

1112991840 is a wasteful number, since it uses less digits than its factorization.

1112991840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 731 (or 714 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 36.

The square root of 1112991840 is about 33361.5323389079. The cubic root of 1112991840 is about 1036.3282254332.

The spelling of 1112991840 in words is "one billion, one hundred twelve million, nine hundred ninety-one thousand, eight hundred forty".