111797928 has 128 divisors (see below), whose sum is σ = 341913600. Its totient is φ = 33566400.

The previous prime is 111797923. The next prime is 111797947. The reversal of 111797928 is 829797111.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (111797923) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 501225 + ... + 501447.

It is an arithmetic number, because the mean of its divisors is an integer number (2671200).

Almost surely, 2^111797928 is an apocalyptic number.

111797928 is a gapful number since it is divisible by the number (18) 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 111797928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (170956800).

111797928 is an abundant number, since it is smaller than the sum of its proper divisors (230115672).

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

111797928 is a wasteful number, since it uses less digits than its factorization.

111797928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 460 (or 450 counting only the distinct ones).

The product of its digits is 63504, while the sum is 45.

The square root of 111797928 is about 10573.4539295350. The cubic root of 111797928 is about 481.7383841094.

The spelling of 111797928 in words is "one hundred eleven million, seven hundred ninety-seven thousand, nine hundred twenty-eight".