28917767 has 2 divisors, whose sum is σ = 28917768. Its totient is φ = 28917766.

The previous prime is 28917743. The next prime is 28917797. The reversal of 28917767 is 76771982.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28917767 - 2⁶ = 28917703 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28917797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14458883 + 14458884.

It is an arithmetic number, because the mean of its divisors is an integer number (14458884).

Almost surely, 2^28917767 is an apocalyptic number.

28917767 is a deficient number, since it is larger than the sum of its proper divisors (1).

28917767 is an equidigital number, since it uses as much as digits as its factorization.

28917767 is an evil number, because the sum of its binary digits is even.

The product of its digits is 296352, while the sum is 47.

The square root of 28917767 is about 5377.5242444828. The cubic root of 28917767 is about 306.9410101444.

The spelling of 28917767 in words is "twenty-eight million, nine hundred seventeen thousand, seven hundred sixty-seven".