28558633 has 2 divisors, whose sum is σ = 28558634. Its totient is φ = 28558632.

The previous prime is 28558631. The next prime is 28558637. The reversal of 28558633 is 33685582.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28164249 + 394384 = 5307^2 + 628^2 .

It is a cyclic number.

It is not a de Polignac number, because 28558633 - 2¹ = 28558631 is a prime.

Together with 28558631, it forms a pair of twin primes.

It is a plaindrome in base 13.

It is not a weakly prime, because it can be changed into another prime (28558631) 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, 14279316 + 14279317.

It is an arithmetic number, because the mean of its divisors is an integer number (14279317).

Almost surely, 2^28558633 is an apocalyptic number.

It is an amenable number.

28558633 is a deficient number, since it is larger than the sum of its proper divisors (1).

28558633 is an equidigital number, since it uses as much as digits as its factorization.

28558633 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 172800, while the sum is 40.

The square root of 28558633 is about 5344.0277881014. The cubic root of 28558633 is about 305.6650649143.

The spelling of 28558633 in words is "twenty-eight million, five hundred fifty-eight thousand, six hundred thirty-three".