28669807 has 2 divisors, whose sum is σ = 28669808. Its totient is φ = 28669806.

The previous prime is 28669793. The next prime is 28669813. The reversal of 28669807 is 70896682.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28669807 - 2¹⁵ = 28637039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28669867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14334903 + 14334904.

It is an arithmetic number, because the mean of its divisors is an integer number (14334904).

Almost surely, 2^28669807 is an apocalyptic number.

28669807 is a deficient number, since it is larger than the sum of its proper divisors (1).

28669807 is an equidigital number, since it uses as much as digits as its factorization.

28669807 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 290304, while the sum is 46.

The square root of 28669807 is about 5354.4193896257. The cubic root of 28669807 is about 306.0611857372.

The spelling of 28669807 in words is "twenty-eight million, six hundred sixty-nine thousand, eight hundred seven".