11128287 has 8 divisors (see below), whose sum is σ = 15316480. Its totient is φ = 7179480.

The previous prime is 11128277. The next prime is 11128309. The reversal of 11128287 is 78282111.

It is a happy number.

11128287 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11128287 - 2⁸ = 11128031 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11128207) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59737 + ... + 59922.

It is an arithmetic number, because the mean of its divisors is an integer number (1914560).

Almost surely, 2^11128287 is an apocalyptic number.

11128287 is a deficient number, since it is larger than the sum of its proper divisors (4188193).

11128287 is a wasteful number, since it uses less digits than its factorization.

11128287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119693.

The product of its digits is 1792, while the sum is 30.

The square root of 11128287 is about 3335.9087217728. The cubic root of 11128287 is about 223.2592385575.

The spelling of 11128287 in words is "eleven million, one hundred twenty-eight thousand, two hundred eighty-seven".