11028556 has 48 divisors (see below), whose sum is σ = 24498432. Its totient is φ = 4219200.

The previous prime is 11028551. The next prime is 11028593. The reversal of 11028556 is 65582011.

11028556 is a nontrivial binomial coefficient, being equal to C(4697, 2).

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11028551) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18495 + ... + 19081.

It is an arithmetic number, because the mean of its divisors is an integer number (510384).

Almost surely, 2^11028556 is an apocalyptic number.

11028556 is the 4696-th triangular number.

11028556 is the 1566-th centered nonagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11028556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12249216).

11028556 is an abundant number, since it is smaller than the sum of its proper divisors (13469876).

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

11028556 is a wasteful number, since it uses less digits than its factorization.

11028556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670 (or 668 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 28.

The square root of 11028556 is about 3320.9269790226. The cubic root of 11028556 is about 222.5902911752.

The spelling of 11028556 in words is "eleven million, twenty-eight thousand, five hundred fifty-six".