28268917 has 2 divisors, whose sum is σ = 28268918. Its totient is φ = 28268916.

The previous prime is 28268899. The next prime is 28268951. The reversal of 28268917 is 71986282.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25816561 + 2452356 = 5081^2 + 1566^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28268917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28268957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14134458 + 14134459.

It is an arithmetic number, because the mean of its divisors is an integer number (14134459).

Almost surely, 2^28268917 is an apocalyptic number.

It is an amenable number.

28268917 is a deficient number, since it is larger than the sum of its proper divisors (1).

28268917 is an equidigital number, since it uses as much as digits as its factorization.

28268917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96768, while the sum is 43.

The square root of 28268917 is about 5316.8521702225. The cubic root of 28268917 is about 304.6279329373.

The spelling of 28268917 in words is "twenty-eight million, two hundred sixty-eight thousand, nine hundred seventeen".