28707863 has 2 divisors, whose sum is σ = 28707864. Its totient is φ = 28707862.

The previous prime is 28707859. The next prime is 28707869. The reversal of 28707863 is 36870782.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28707863 - 2² = 28707859 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28707863.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28707869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14353931 + 14353932.

It is an arithmetic number, because the mean of its divisors is an integer number (14353932).

Almost surely, 2^28707863 is an apocalyptic number.

28707863 is a deficient number, since it is larger than the sum of its proper divisors (1).

28707863 is an equidigital number, since it uses as much as digits as its factorization.

28707863 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112896, while the sum is 41.

The square root of 28707863 is about 5357.9719110873. The cubic root of 28707863 is about 306.1965466613.

The spelling of 28707863 in words is "twenty-eight million, seven hundred seven thousand, eight hundred sixty-three".