111800728 has 16 divisors (see below), whose sum is σ = 225751680. Its totient is φ = 51600288.

The previous prime is 111800719. The next prime is 111800737. The reversal of 111800728 is 827008111.

It is an interprime number because it is at equal distance from previous prime (111800719) and next prime (111800737).

It is a junction number, because it is equal to n+sod(n) for n = 111800696 and 111800705.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 537400 + ... + 537607.

It is an arithmetic number, because the mean of its divisors is an integer number (14109480).

Almost surely, 2^111800728 is an apocalyptic number.

It is an amenable number.

111800728 is an abundant number, since it is smaller than the sum of its proper divisors (113950952).

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

111800728 is a wasteful number, since it uses less digits than its factorization.

111800728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1075026 (or 1075022 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 28.

The square root of 111800728 is about 10573.5863357708. The cubic root of 111800728 is about 481.7424058185.

Adding to 111800728 its reverse (827008111), we get a palindrome (938808839).

The spelling of 111800728 in words is "one hundred eleven million, eight hundred thousand, seven hundred twenty-eight".