28750855 has 16 divisors (see below), whose sum is σ = 39536640. Its totient is φ = 19661472.

The previous prime is 28750823. The next prime is 28750873. The reversal of 28750855 is 55805782.

It is a cyclic number.

It is not a de Polignac number, because 28750855 - 2⁵ = 28750823 is a prime.

It is a super-2 number, since 2×28750855² = 1653223326462050, which contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 15466 + ... + 17224.

It is an arithmetic number, because the mean of its divisors is an integer number (2471040).

Almost surely, 2^28750855 is an apocalyptic number.

28750855 is a deficient number, since it is larger than the sum of its proper divisors (10785785).

28750855 is a wasteful number, since it uses less digits than its factorization.

28750855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2238.

The product of its (nonzero) digits is 112000, while the sum is 40.

The square root of 28750855 is about 5361.9823759501. The cubic root of 28750855 is about 306.3493205553.

The spelling of 28750855 in words is "twenty-eight million, seven hundred fifty thousand, eight hundred fifty-five".