28725899 has 2 divisors, whose sum is σ = 28725900. Its totient is φ = 28725898.

The previous prime is 28725881. The next prime is 28725911. The reversal of 28725899 is 99852782.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28725899 - 2¹⁶ = 28660363 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28725199) 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, 14362949 + 14362950.

It is an arithmetic number, because the mean of its divisors is an integer number (14362950).

Almost surely, 2^28725899 is an apocalyptic number.

28725899 is a deficient number, since it is larger than the sum of its proper divisors (1).

28725899 is an equidigital number, since it uses as much as digits as its factorization.

28725899 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 725760, while the sum is 50.

The square root of 28725899 is about 5359.6547463433. The cubic root of 28725899 is about 306.2606569108.

The spelling of 28725899 in words is "twenty-eight million, seven hundred twenty-five thousand, eight hundred ninety-nine".