28356563 has 2 divisors, whose sum is σ = 28356564. Its totient is φ = 28356562.

The previous prime is 28356551. The next prime is 28356589. The reversal of 28356563 is 36565382.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28356563 - 2⁴ = 28356547 is a prime.

It is not a weakly prime, because it can be changed into another prime (28356863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14178281 + 14178282.

It is an arithmetic number, because the mean of its divisors is an integer number (14178282).

Almost surely, 2^28356563 is an apocalyptic number.

28356563 is a deficient number, since it is larger than the sum of its proper divisors (1).

28356563 is an equidigital number, since it uses as much as digits as its factorization.

28356563 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 129600, while the sum is 38.

The square root of 28356563 is about 5325.0880743890. The cubic root of 28356563 is about 304.9424347150.

The spelling of 28356563 in words is "twenty-eight million, three hundred fifty-six thousand, five hundred sixty-three".