111306728 has 16 divisors (see below), whose sum is σ = 224754180. Its totient is φ = 51372288.

The previous prime is 111306721. The next prime is 111306733. The reversal of 111306728 is 827603111.

It can be written as a sum of positive squares in 2 ways, for example, as 95609284 + 15697444 = 9778^2 + 3962^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 111306728.

It is not an unprimeable number, because it can be changed into a prime (111306721) 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, 535025 + ... + 535232.

Almost surely, 2^111306728 is an apocalyptic number.

It is an amenable number.

111306728 is an abundant number, since it is smaller than the sum of its proper divisors (113447452).

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

111306728 is a wasteful number, since it uses less digits than its factorization.

111306728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1070276 (or 1070272 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 111306728 is about 10550.2003772440. The cubic root of 111306728 is about 481.0318197376.

Adding to 111306728 its reverse (827603111), we get a palindrome (938909839).

The spelling of 111306728 in words is "one hundred eleven million, three hundred six thousand, seven hundred twenty-eight".