28228763 has 2 divisors, whose sum is σ = 28228764. Its totient is φ = 28228762.

The previous prime is 28228741. The next prime is 28228777. The reversal of 28228763 is 36782282.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28228763 is a prime.

It is not a weakly prime, because it can be changed into another prime (28228363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14114381 + 14114382.

It is an arithmetic number, because the mean of its divisors is an integer number (14114382).

Almost surely, 2^28228763 is an apocalyptic number.

28228763 is a deficient number, since it is larger than the sum of its proper divisors (1).

28228763 is an equidigital number, since it uses as much as digits as its factorization.

28228763 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64512, while the sum is 38.

The square root of 28228763 is about 5313.0747218536. The cubic root of 28228763 is about 304.4836304375.

The spelling of 28228763 in words is "twenty-eight million, two hundred twenty-eight thousand, seven hundred sixty-three".