28000255 has 8 divisors (see below), whose sum is σ = 33660000. Its totient is φ = 22360416.

The previous prime is 28000237. The next prime is 28000321. The reversal of 28000255 is 55200082.

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

It is a cyclic number.

It is not a de Polignac number, because 28000255 - 2¹⁹ = 27475967 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1680 + ... + 7669.

It is an arithmetic number, because the mean of its divisors is an integer number (4207500).

Almost surely, 2^28000255 is an apocalyptic number.

28000255 is a deficient number, since it is larger than the sum of its proper divisors (5659745).

28000255 is an equidigital number, since it uses as much as digits as its factorization.

28000255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9953.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 28000255 is about 5291.5267173095. The cubic root of 28000255 is about 303.6598190064.

The spelling of 28000255 in words is "twenty-eight million, two hundred fifty-five", and thus it is an aban number.