28556799 has 4 divisors (see below), whose sum is σ = 38075736. Its totient is φ = 19037864.

The previous prime is 28556779. The next prime is 28556809. The reversal of 28556799 is 99765582.

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 28556799 - 2⁹ = 28556287 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28556729) 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, 4759464 + ... + 4759469.

It is an arithmetic number, because the mean of its divisors is an integer number (9518934).

Almost surely, 2^28556799 is an apocalyptic number.

28556799 is a deficient number, since it is larger than the sum of its proper divisors (9518937).

28556799 is an equidigital number, since it uses as much as digits as its factorization.

28556799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9518936.

The product of its digits is 1360800, while the sum is 51.

The square root of 28556799 is about 5343.8561919273. The cubic root of 28556799 is about 305.6585216304.

The spelling of 28556799 in words is "twenty-eight million, five hundred fifty-six thousand, seven hundred ninety-nine".