28718567 has 2 divisors, whose sum is σ = 28718568. Its totient is φ = 28718566.

The previous prime is 28718537. The next prime is 28718579. The reversal of 28718567 is 76581782.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28718567 - 2⁸ = 28718311 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28718507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14359283 + 14359284.

It is an arithmetic number, because the mean of its divisors is an integer number (14359284).

Almost surely, 2^28718567 is an apocalyptic number.

28718567 is a deficient number, since it is larger than the sum of its proper divisors (1).

28718567 is an equidigital number, since it uses as much as digits as its factorization.

28718567 is an evil number, because the sum of its binary digits is even.

The product of its digits is 188160, while the sum is 44.

The square root of 28718567 is about 5358.9707034094. The cubic root of 28718567 is about 306.2345980315.

The spelling of 28718567 in words is "twenty-eight million, seven hundred eighteen thousand, five hundred sixty-seven".