1121992368 has 160 divisors (see below), whose sum is σ = 3460492800. Its totient is φ = 306475008.

The previous prime is 1121992357. The next prime is 1121992369. The reversal of 1121992368 is 8632991211.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (1121992369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1100563 + ... + 1101581.

It is an arithmetic number, because the mean of its divisors is an integer number (21628080).

Almost surely, 2^1121992368 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1121992368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1730246400).

1121992368 is an abundant number, since it is smaller than the sum of its proper divisors (2338500432).

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

1121992368 is a wasteful number, since it uses less digits than its factorization.

1121992368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1179 (or 1173 counting only the distinct ones).

The product of its digits is 46656, while the sum is 42.

The square root of 1121992368 is about 33496.1545255571. The cubic root of 1121992368 is about 1039.1142507685.

The spelling of 1121992368 in words is "one billion, one hundred twenty-one million, nine hundred ninety-two thousand, three hundred sixty-eight".