111297992 has 48 divisors (see below), whose sum is σ = 227681280. Its totient is φ = 50980800.

The previous prime is 111297947. The next prime is 111298003. The reversal of 111297992 is 299792111.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 258017 + ... + 258447.

It is an arithmetic number, because the mean of its divisors is an integer number (4743360).

Almost surely, 2^111297992 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 111297992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (113840640).

111297992 is an abundant number, since it is smaller than the sum of its proper divisors (116383288).

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

111297992 is a wasteful number, since it uses less digits than its factorization.

111297992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 654 (or 637 counting only the distinct ones).

The product of its digits is 20412, while the sum is 41.

The square root of 111297992 is about 10549.7863485475. The cubic root of 111297992 is about 481.0192346825.

The spelling of 111297992 in words is "one hundred eleven million, two hundred ninety-seven thousand, nine hundred ninety-two".