111898840 has 96 divisors (see below), whose sum is σ = 270254880. Its totient is φ = 41664000.

The previous prime is 111898837. The next prime is 111898861. The reversal of 111898840 is 48898111.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 111898793 and 111898802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1576005 + ... + 1576075.

It is an arithmetic number, because the mean of its divisors is an integer number (2815155).

Almost surely, 2^111898840 is an apocalyptic number.

111898840 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 111898840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (135127440).

111898840 is an abundant number, since it is smaller than the sum of its proper divisors (158356040).

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

111898840 is a wasteful number, since it uses less digits than its factorization.

111898840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185 (or 150 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 40.

The square root of 111898840 is about 10578.2248038128. The cubic root of 111898840 is about 481.8832841252.

The spelling of 111898840 in words is "one hundred eleven million, eight hundred ninety-eight thousand, eight hundred forty".