28739863 has 2 divisors, whose sum is σ = 28739864. Its totient is φ = 28739862.

The previous prime is 28739849. The next prime is 28739873. The reversal of 28739863 is 36893782.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28739863 - 2⁵ = 28739831 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28739803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14369931 + 14369932.

It is an arithmetic number, because the mean of its divisors is an integer number (14369932).

Almost surely, 2^28739863 is an apocalyptic number.

28739863 is a deficient number, since it is larger than the sum of its proper divisors (1).

28739863 is an equidigital number, since it uses as much as digits as its factorization.

28739863 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 435456, while the sum is 46.

The square root of 28739863 is about 5360.9572839186. The cubic root of 28739863 is about 306.3102745170.

The spelling of 28739863 in words is "twenty-eight million, seven hundred thirty-nine thousand, eight hundred sixty-three".