111981240 has 192 divisors, whose sum is σ = 427527360. Its totient is φ = 24883200.

The previous prime is 111981223. The next prime is 111981241. The reversal of 111981240 is 42189111.

It is a super-2 number, since 2×111981240² = 25079596223875200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111981241) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 92640 + ... + 93840.

It is an arithmetic number, because the mean of its divisors is an integer number (2226705).

Almost surely, 2^111981240 is an apocalyptic number.

111981240 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 111981240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (213763680).

111981240 is an abundant number, since it is smaller than the sum of its proper divisors (315546120).

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

111981240 is a wasteful number, since it uses less digits than its factorization.

111981240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1262 (or 1255 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 27.

The square root of 111981240 is about 10582.1188804511. The cubic root of 111981240 is about 482.0015380770.

The spelling of 111981240 in words is "one hundred eleven million, nine hundred eighty-one thousand, two hundred forty".