28522647 has 12 divisors (see below), whose sum is σ = 41310360. Its totient is φ = 18963888.

The previous prime is 28522619. The next prime is 28522649. The reversal of 28522647 is 74622582.

28522647 is a `hidden beast` number, since 2 + 8 + 5 + 2 + 2 + 647 = 666.

It is not a de Polignac number, because 28522647 - 2¹⁹ = 27998359 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28522649) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 573 + ... + 7574.

It is an arithmetic number, because the mean of its divisors is an integer number (3442530).

Almost surely, 2^28522647 is an apocalyptic number.

28522647 is a deficient number, since it is larger than the sum of its proper divisors (12787713).

28522647 is a wasteful number, since it uses less digits than its factorization.

28522647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8542 (or 8539 counting only the distinct ones).

The product of its digits is 53760, while the sum is 36.

The square root of 28522647 is about 5340.6597907000. The cubic root of 28522647 is about 305.5366240514.

The spelling of 28522647 in words is "twenty-eight million, five hundred twenty-two thousand, six hundred forty-seven".