11187428 has 48 divisors (see below), whose sum is σ = 24958080. Its totient is φ = 4271616.

The previous prime is 11187419. The next prime is 11187503. The reversal of 11187428 is 82478111.

11187428 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 11187394 and 11187403.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8426 + ... + 9662.

It is an arithmetic number, because the mean of its divisors is an integer number (519960).

Almost surely, 2^11187428 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 11187428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12479040).

11187428 is an abundant number, since it is smaller than the sum of its proper divisors (13770652).

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

11187428 is a wasteful number, since it uses less digits than its factorization.

11187428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1284 (or 1282 counting only the distinct ones).

The product of its digits is 3584, while the sum is 32.

The square root of 11187428 is about 3344.7612769823. The cubic root of 11187428 is about 223.6540418508.

The spelling of 11187428 in words is "eleven million, one hundred eighty-seven thousand, four hundred twenty-eight".