109375728 has 160 divisors (see below), whose sum is σ = 356977152. Its totient is φ = 28032000.

The previous prime is 109375727. The next prime is 109375759. The reversal of 109375728 is 827573901.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 109375728.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109375727) 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, 373150 + ... + 373442.

Almost surely, 2^109375728 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 109375728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (178488576).

109375728 is an abundant number, since it is smaller than the sum of its proper divisors (247601424).

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

109375728 is a wasteful number, since it uses less digits than its factorization.

109375728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423 (or 417 counting only the distinct ones).

The product of its (nonzero) digits is 105840, while the sum is 42.

The square root of 109375728 is about 10458.2851366751. The cubic root of 109375728 is about 478.2338567299.

The spelling of 109375728 in words is "one hundred nine million, three hundred seventy-five thousand, seven hundred twenty-eight".