1115991296 has 144 divisors (see below), whose sum is σ = 2722608000. Its totient is φ = 445906944.

The previous prime is 1115991293. The next prime is 1115991307. The reversal of 1115991296 is 6921995111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1115991293) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2485280 + ... + 2485728.

It is an arithmetic number, because the mean of its divisors is an integer number (18907000).

Almost surely, 2^1115991296 is an apocalyptic number.

1115991296 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 1115991296, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1361304000).

1115991296 is an abundant number, since it is smaller than the sum of its proper divisors (1606616704).

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

1115991296 is an equidigital number, since it uses as much as digits as its factorization.

1115991296 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 564 (or 550 counting only the distinct ones).

The product of its digits is 43740, while the sum is 44.

The square root of 1115991296 is about 33406.4559030137. The cubic root of 1115991296 is about 1037.2583408903.

The spelling of 1115991296 in words is "one billion, one hundred fifteen million, nine hundred ninety-one thousand, two hundred ninety-six".