11309028 has 48 divisors (see below), whose sum is σ = 28029120. Its totient is φ = 3538944.

The previous prime is 11309027. The next prime is 11309033. The reversal of 11309028 is 82090311.

It is a super-2 number, since 2×11309028² = 255788228609568, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11308989 and 11309007.

It is not an unprimeable number, because it can be changed into a prime (11309021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43876 + ... + 44132.

It is an arithmetic number, because the mean of its divisors is an integer number (583940).

Almost surely, 2^11309028 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 11309028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14014560).

11309028 is an abundant number, since it is smaller than the sum of its proper divisors (16720092).

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

11309028 is a wasteful number, since it uses less digits than its factorization.

11309028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 476 (or 474 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 11309028 is about 3362.8898287039. The cubic root of 11309028 is about 224.4614477709.

Adding to 11309028 its reverse (82090311), we get a palindrome (93399339).

The spelling of 11309028 in words is "eleven million, three hundred nine thousand, twenty-eight".