28800817 has 2 divisors, whose sum is σ = 28800818. Its totient is φ = 28800816.

The previous prime is 28800781. The next prime is 28800823. The reversal of 28800817 is 71800882.

Together with previous prime (28800781) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24117921 + 4682896 = 4911^2 + 2164^2 .

It is a cyclic number.

It is not a de Polignac number, because 28800817 - 2²³ = 20412209 is a prime.

It is not a weakly prime, because it can be changed into another prime (28800847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14400408 + 14400409.

It is an arithmetic number, because the mean of its divisors is an integer number (14400409).

Almost surely, 2^28800817 is an apocalyptic number.

It is an amenable number.

28800817 is a deficient number, since it is larger than the sum of its proper divisors (1).

28800817 is an equidigital number, since it uses as much as digits as its factorization.

28800817 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7168, while the sum is 34.

The square root of 28800817 is about 5366.6392649404. The cubic root of 28800817 is about 306.5266714245.

The spelling of 28800817 in words is "twenty-eight million, eight hundred thousand, eight hundred seventeen".