28227587 has 4 divisors (see below), whose sum is σ = 28256256. Its totient is φ = 28198920.

The previous prime is 28227523. The next prime is 28227649. The reversal of 28227587 is 78572282.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28227587 - 2⁶ = 28227523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28226587) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12803 + ... + 14844.

It is an arithmetic number, because the mean of its divisors is an integer number (7064064).

Almost surely, 2^28227587 is an apocalyptic number.

28227587 is a deficient number, since it is larger than the sum of its proper divisors (28669).

28227587 is a wasteful number, since it uses less digits than its factorization.

28227587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28668.

The product of its digits is 125440, while the sum is 41.

The square root of 28227587 is about 5312.9640503207. The cubic root of 28227587 is about 304.4794021530.

The spelling of 28227587 in words is "twenty-eight million, two hundred twenty-seven thousand, five hundred eighty-seven".