28706563 has 2 divisors, whose sum is σ = 28706564. Its totient is φ = 28706562.

The previous prime is 28706551. The next prime is 28706581. The reversal of 28706563 is 36560782.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28706563 - 2²¹ = 26609411 is a prime.

It is not a weakly prime, because it can be changed into another prime (28706543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14353281 + 14353282.

It is an arithmetic number, because the mean of its divisors is an integer number (14353282).

Almost surely, 2^28706563 is an apocalyptic number.

28706563 is a deficient number, since it is larger than the sum of its proper divisors (1).

28706563 is an equidigital number, since it uses as much as digits as its factorization.

28706563 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 28706563 is about 5357.8505951547. The cubic root of 28706563 is about 306.1919246811.

The spelling of 28706563 in words is "twenty-eight million, seven hundred six thousand, five hundred sixty-three".