11428287 has 12 divisors (see below), whose sum is σ = 16500744. Its totient is φ = 7032480.

The previous prime is 11428273. The next prime is 11428297. The reversal of 11428287 is 78282411.

It is a happy number.

It is not a de Polignac number, because 11428287 - 2⁴ = 11428271 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11428237) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10764 + ... + 11777.

It is an arithmetic number, because the mean of its divisors is an integer number (1375062).

Almost surely, 2^11428287 is an apocalyptic number.

11428287 is a deficient number, since it is larger than the sum of its proper divisors (5072457).

11428287 is a wasteful number, since it uses less digits than its factorization.

11428287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22570 (or 22557 counting only the distinct ones).

The product of its digits is 7168, while the sum is 33.

The square root of 11428287 is about 3380.5749510993. The cubic root of 11428287 is about 225.2477074403.

The spelling of 11428287 in words is "eleven million, four hundred twenty-eight thousand, two hundred eighty-seven".