111298428 has 96 divisors (see below), whose sum is σ = 308313600. Its totient is φ = 34618752.

The previous prime is 111298427. The next prime is 111298469. The reversal of 111298428 is 824892111.

It is a happy number.

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 = 111298392 and 111298401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111298427) 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, 149425 + ... + 150167.

It is an arithmetic number, because the mean of its divisors is an integer number (3211600).

Almost surely, 2^111298428 is an apocalyptic number.

111298428 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 111298428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (154156800).

111298428 is an abundant number, since it is smaller than the sum of its proper divisors (197015172).

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

111298428 is a wasteful number, since it uses less digits than its factorization.

111298428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 848 (or 840 counting only the distinct ones).

The product of its digits is 9216, while the sum is 36.

The square root of 111298428 is about 10549.8070124529. The cubic root of 111298428 is about 481.0198627984.

The spelling of 111298428 in words is "one hundred eleven million, two hundred ninety-eight thousand, four hundred twenty-eight".