28335869 has 2 divisors, whose sum is σ = 28335870. Its totient is φ = 28335868.

The previous prime is 28335851. The next prime is 28335911. The reversal of 28335869 is 96853382.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20839225 + 7496644 = 4565^2 + 2738^2 .

It is a cyclic number.

It is not a de Polignac number, because 28335869 - 2⁸ = 28335613 is a prime.

It is a super-2 number, since 2×28335869² = 1605842943970322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28335269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14167934 + 14167935.

It is an arithmetic number, because the mean of its divisors is an integer number (14167935).

Almost surely, 2^28335869 is an apocalyptic number.

It is an amenable number.

28335869 is a deficient number, since it is larger than the sum of its proper divisors (1).

28335869 is an equidigital number, since it uses as much as digits as its factorization.

28335869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 311040, while the sum is 44.

The square root of 28335869 is about 5323.1446533041. The cubic root of 28335869 is about 304.8682365544.

The spelling of 28335869 in words is "twenty-eight million, three hundred thirty-five thousand, eight hundred sixty-nine".