11128280 has 16 divisors (see below), whose sum is σ = 25038720. Its totient is φ = 4451296.

The previous prime is 11128277. The next prime is 11128309. The reversal of 11128280 is 8282111.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 139064 + ... + 139143.

It is an arithmetic number, because the mean of its divisors is an integer number (1564920).

Almost surely, 2^11128280 is an apocalyptic number.

11128280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11128280 is an abundant number, since it is smaller than the sum of its proper divisors (13910440).

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

11128280 is a wasteful number, since it uses less digits than its factorization.

11128280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278218 (or 278214 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 23.

The square root of 11128280 is about 3335.9076725833. The cubic root of 11128280 is about 223.2591917454.

The spelling of 11128280 in words is "eleven million, one hundred twenty-eight thousand, two hundred eighty".