111403980 has 72 divisors (see below), whose sum is σ = 340088112. Its totient is φ = 29517696.

The previous prime is 111403979. The next prime is 111404021. The reversal of 111403980 is 89304111.

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, 27442 + ... + 31238.

It is an arithmetic number, because the mean of its divisors is an integer number (4723446).

Almost surely, 2^111403980 is an apocalyptic number.

111403980 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 111403980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (170044056).

111403980 is an abundant number, since it is smaller than the sum of its proper divisors (228684132).

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

111403980 is a wasteful number, since it uses less digits than its factorization.

111403980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3975 (or 3970 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 111403980 is about 10554.8083829125. The cubic root of 111403980 is about 481.1718762261.

The spelling of 111403980 in words is "one hundred eleven million, four hundred three thousand, nine hundred eighty".