28636873 has 2 divisors, whose sum is σ = 28636874. Its totient is φ = 28636872.

The previous prime is 28636871. The next prime is 28636897. The reversal of 28636873 is 37863682.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15116544 + 13520329 = 3888^2 + 3677^2 .

It is a cyclic number.

It is not a de Polignac number, because 28636873 - 2¹ = 28636871 is a prime.

Together with 28636871, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (28636871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14318436 + 14318437.

It is an arithmetic number, because the mean of its divisors is an integer number (14318437).

Almost surely, 2^28636873 is an apocalyptic number.

It is an amenable number.

28636873 is a deficient number, since it is larger than the sum of its proper divisors (1).

28636873 is an equidigital number, since it uses as much as digits as its factorization.

28636873 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 290304, while the sum is 43.

The square root of 28636873 is about 5351.3431024370. The cubic root of 28636873 is about 305.9439464729.

The spelling of 28636873 in words is "twenty-eight million, six hundred thirty-six thousand, eight hundred seventy-three".