111573728 has 48 divisors (see below), whose sum is σ = 252403200. Its totient is φ = 47558016.

The previous prime is 111573727. The next prime is 111573739. The reversal of 111573728 is 827375111.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111573727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43325 + ... + 45827.

It is an arithmetic number, because the mean of its divisors is an integer number (5258400).

Almost surely, 2^111573728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 111573728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (126201600).

111573728 is an abundant number, since it is smaller than the sum of its proper divisors (140829472).

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

111573728 is a wasteful number, since it uses less digits than its factorization.

111573728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2719 (or 2711 counting only the distinct ones).

The product of its digits is 11760, while the sum is 35.

The square root of 111573728 is about 10562.8465860297. The cubic root of 111573728 is about 481.4161419278.

The spelling of 111573728 in words is "one hundred eleven million, five hundred seventy-three thousand, seven hundred twenty-eight".