1113009728 has 28 divisors (see below), whose sum is σ = 2268326172. Its totient is φ = 541463040.

The previous prime is 1113009727. The next prime is 1113009731. The reversal of 1113009728 is 8279003111.

It can be written as a sum of positive squares in 2 ways, for example, as 730729024 + 382280704 = 27032^2 + 19552^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 1113009694 and 1113009703.

It is not an unprimeable number, because it can be changed into a prime (1113009727) 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, 232643 + ... + 237378.

It is an arithmetic number, because the mean of its divisors is an integer number (81011649).

Almost surely, 2^1113009728 is an apocalyptic number.

It is an amenable number.

1113009728 is an abundant number, since it is smaller than the sum of its proper divisors (1155316444).

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

1113009728 is an equidigital number, since it uses as much as digits as its factorization.

1113009728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 470070 (or 470060 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 32.

The square root of 1113009728 is about 33361.8004310319. The cubic root of 1113009728 is about 1036.3337773577. Note that the first 3 decimals are identical.

The spelling of 1113009728 in words is "one billion, one hundred thirteen million, nine thousand, seven hundred twenty-eight".