111828 has 12 divisors (see below), whose sum is σ = 260960. Its totient is φ = 37272.

The previous prime is 111827. The next prime is 111829. The reversal of 111828 is 828111.

It is an interprime number because it is at equal distance from previous prime (111827) and next prime (111829).

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4648 + ... + 4671.

2¹¹¹⁸²⁸ is an apocalyptic number.

It is an amenable number.

111828 is an abundant number, since it is smaller than the sum of its proper divisors (149132).

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

111828 is a wasteful number, since it uses less digits than its factorization.

111828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9326 (or 9324 counting only the distinct ones).

The product of its digits is 128, while the sum is 21.

The square root of 111828 is about 334.4069377271. The cubic root of 111828 is about 48.1781573753.

Adding to 111828 its reverse (828111), we get a palindrome (939939).

It can be divided in two parts, 111 and 828, that added together give a palindrome (939).

The spelling of 111828 in words is "one hundred eleven thousand, eight hundred twenty-eight".