111887028 has 96 divisors (see below), whose sum is σ = 322600320. Its totient is φ = 33246720.

The previous prime is 111887023. The next prime is 111887057. The reversal of 111887028 is 820788111.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 111886983 and 111887001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111887023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 62076 + ... + 63852.

It is an arithmetic number, because the mean of its divisors is an integer number (3360420).

Almost surely, 2^111887028 is an apocalyptic number.

111887028 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 111887028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (161300160).

111887028 is an abundant number, since it is smaller than the sum of its proper divisors (210713292).

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

111887028 is a wasteful number, since it uses less digits than its factorization.

111887028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1854 (or 1846 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 36.

The square root of 111887028 is about 10577.6664723369. Note that the first 3 decimals coincide. The cubic root of 111887028 is about 481.8663277217.

The spelling of 111887028 in words is "one hundred eleven million, eight hundred eighty-seven thousand, twenty-eight".