28007563 has 2 divisors, whose sum is σ = 28007564. Its totient is φ = 28007562.

The previous prime is 28007549. The next prime is 28007569. The reversal of 28007563 is 36570082.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28007563 - 2¹³ = 27999371 is a prime.

It is not a weakly prime, because it can be changed into another prime (28007569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14003781 + 14003782.

It is an arithmetic number, because the mean of its divisors is an integer number (14003782).

Almost surely, 2^28007563 is an apocalyptic number.

28007563 is a deficient number, since it is larger than the sum of its proper divisors (1).

28007563 is an equidigital number, since it uses as much as digits as its factorization.

28007563 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 28007563 is about 5292.2172102059. The cubic root of 28007563 is about 303.6862348721.

The spelling of 28007563 in words is "twenty-eight million, seven thousand, five hundred sixty-three".