1109728 has 12 divisors (see below), whose sum is σ = 2184840. Its totient is φ = 554848.

The previous prime is 1109723. The next prime is 1109737. The reversal of 1109728 is 8279011.

It is a junction number, because it is equal to n+sod(n) for n = 1109696 and 1109705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1109723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17308 + ... + 17371.

It is an arithmetic number, because the mean of its divisors is an integer number (182070).

2^1109728 is an apocalyptic number.

It is an amenable number.

1109728 is a deficient number, since it is larger than the sum of its proper divisors (1075112).

1109728 is an equidigital number, since it uses as much as digits as its factorization.

1109728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34689 (or 34681 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 28.

The square root of 1109728 is about 1053.4362818889. The cubic root of 1109728 is about 103.5314225424.

The spelling of 1109728 in words is "one million, one hundred nine thousand, seven hundred twenty-eight".