28256001 has 4 divisors (see below), whose sum is σ = 37674672. Its totient is φ = 18837332.

The previous prime is 28255991. The next prime is 28256017. The reversal of 28256001 is 10065282.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28256001 - 2⁷ = 28255873 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28256101) 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, 4709331 + ... + 4709336.

It is an arithmetic number, because the mean of its divisors is an integer number (9418668).

Almost surely, 2^28256001 is an apocalyptic number.

It is an amenable number.

28256001 is a deficient number, since it is larger than the sum of its proper divisors (9418671).

28256001 is an equidigital number, since it uses as much as digits as its factorization.

28256001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9418670.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 28256001 is about 5315.6374029838. The cubic root of 28256001 is about 304.5815312804.

The spelling of 28256001 in words is "twenty-eight million, two hundred fifty-six thousand, one".