28256801 has 2 divisors, whose sum is σ = 28256802. Its totient is φ = 28256800.

The previous prime is 28256797. The next prime is 28256843. The reversal of 28256801 is 10865282.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20939776 + 7317025 = 4576^2 + 2705^2 .

It is a cyclic number.

It is not a de Polignac number, because 28256801 - 2² = 28256797 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28256861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14128400 + 14128401.

It is an arithmetic number, because the mean of its divisors is an integer number (14128401).

Almost surely, 2^28256801 is an apocalyptic number.

It is an amenable number.

28256801 is a deficient number, since it is larger than the sum of its proper divisors (1).

28256801 is an equidigital number, since it uses as much as digits as its factorization.

28256801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7680, while the sum is 32.

The square root of 28256801 is about 5315.7126521286. The cubic root of 28256801 is about 304.5844057486.

The spelling of 28256801 in words is "twenty-eight million, two hundred fifty-six thousand, eight hundred one".