11118728 has 8 divisors (see below), whose sum is σ = 20847630. Its totient is φ = 5559360.

The previous prime is 11118721. The next prime is 11118733. The reversal of 11118728 is 82781111.

It can be written as a sum of positive squares in only one way, i.e., 6461764 + 4656964 = 2542^2 + 2158^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×11118728² = 247252224675968, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11118728.

It is not an unprimeable number, because it can be changed into a prime (11118721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 694913 + ... + 694928.

Almost surely, 2^11118728 is an apocalyptic number.

It is an amenable number.

11118728 is a deficient number, since it is larger than the sum of its proper divisors (9728902).

11118728 is a wasteful number, since it uses less digits than its factorization.

11118728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1389847 (or 1389843 counting only the distinct ones).

The product of its digits is 896, while the sum is 29.

The square root of 11118728 is about 3334.4756709264. The cubic root of 11118728 is about 223.1952950109.

Adding to 11118728 its reverse (82781111), we get a palindrome (93899839).

The spelling of 11118728 in words is "eleven million, one hundred eighteen thousand, seven hundred twenty-eight".