28281767 has 2 divisors, whose sum is σ = 28281768. Its totient is φ = 28281766.

The previous prime is 28281749. The next prime is 28281769. The reversal of 28281767 is 76718282.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28281767 - 2⁸ = 28281511 is a prime.

Together with 28281769, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28281769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14140883 + 14140884.

It is an arithmetic number, because the mean of its divisors is an integer number (14140884).

Almost surely, 2^28281767 is an apocalyptic number.

28281767 is a deficient number, since it is larger than the sum of its proper divisors (1).

28281767 is an equidigital number, since it uses as much as digits as its factorization.

28281767 is an evil number, because the sum of its binary digits is even.

The product of its digits is 75264, while the sum is 41.

The square root of 28281767 is about 5318.0604547147. The cubic root of 28281767 is about 304.6740834609.

The spelling of 28281767 in words is "twenty-eight million, two hundred eighty-one thousand, seven hundred sixty-seven".