28253567 has 2 divisors, whose sum is σ = 28253568. Its totient is φ = 28253566.

The previous prime is 28253549. The next prime is 28253573. The reversal of 28253567 is 76535282.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28253567 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28253567.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28253587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14126783 + 14126784.

It is an arithmetic number, because the mean of its divisors is an integer number (14126784).

Almost surely, 2^28253567 is an apocalyptic number.

28253567 is a deficient number, since it is larger than the sum of its proper divisors (1).

28253567 is an equidigital number, since it uses as much as digits as its factorization.

28253567 is an evil number, because the sum of its binary digits is even.

The product of its digits is 100800, while the sum is 38.

The square root of 28253567 is about 5315.4084509095. The cubic root of 28253567 is about 304.5727853774.

The spelling of 28253567 in words is "twenty-eight million, two hundred fifty-three thousand, five hundred sixty-seven".