28715849 has 2 divisors, whose sum is σ = 28715850. Its totient is φ = 28715848.

The previous prime is 28715837. The next prime is 28715909. The reversal of 28715849 is 94851782.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28302400 + 413449 = 5320^2 + 643^2 .

It is a cyclic number.

It is not a de Polignac number, because 28715849 - 2⁴ = 28715833 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28715549) 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, 14357924 + 14357925.

It is an arithmetic number, because the mean of its divisors is an integer number (14357925).

Almost surely, 2^28715849 is an apocalyptic number.

It is an amenable number.

28715849 is a deficient number, since it is larger than the sum of its proper divisors (1).

28715849 is an equidigital number, since it uses as much as digits as its factorization.

28715849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 161280, while the sum is 44.

The square root of 28715849 is about 5358.7171039345. The cubic root of 28715849 is about 306.2249367799.

The spelling of 28715849 in words is "twenty-eight million, seven hundred fifteen thousand, eight hundred forty-nine".