1111791840 has 384 divisors, whose sum is σ = 3997486080. Its totient is φ = 258048000.

The previous prime is 1111791839. The next prime is 1111791851. The reversal of 1111791840 is 481971111.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 11007790 + ... + 11007890.

It is an arithmetic number, because the mean of its divisors is an integer number (10410120).

Almost surely, 2^1111791840 is an apocalyptic number.

1111791840 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 1111791840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1998743040).

1111791840 is an abundant number, since it is smaller than the sum of its proper divisors (2885694240).

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

1111791840 is a wasteful number, since it uses less digits than its factorization.

1111791840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226 (or 218 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 33.

The square root of 1111791840 is about 33343.5427031982. The cubic root of 1111791840 is about 1035.9556437631.

The spelling of 1111791840 in words is "one billion, one hundred eleven million, seven hundred ninety-one thousand, eight hundred forty".