28638583 has 2 divisors, whose sum is σ = 28638584. Its totient is φ = 28638582.

The previous prime is 28638581. The next prime is 28638613. The reversal of 28638583 is 38583682.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28638583 - 2¹ = 28638581 is a prime.

Together with 28638581, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28638581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14319291 + 14319292.

It is an arithmetic number, because the mean of its divisors is an integer number (14319292).

Almost surely, 2^28638583 is an apocalyptic number.

28638583 is a deficient number, since it is larger than the sum of its proper divisors (1).

28638583 is an equidigital number, since it uses as much as digits as its factorization.

28638583 is an evil number, because the sum of its binary digits is even.

The product of its digits is 276480, while the sum is 43.

The square root of 28638583 is about 5351.5028730255. The cubic root of 28638583 is about 305.9500359848.

The spelling of 28638583 in words is "twenty-eight million, six hundred thirty-eight thousand, five hundred eighty-three".