28747679 has 2 divisors, whose sum is σ = 28747680. Its totient is φ = 28747678.

The previous prime is 28747651. The next prime is 28747709. The reversal of 28747679 is 97674782.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28747679 - 2²⁴ = 11970463 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28747379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14373839 + 14373840.

It is an arithmetic number, because the mean of its divisors is an integer number (14373840).

Almost surely, 2^28747679 is an apocalyptic number.

28747679 is a deficient number, since it is larger than the sum of its proper divisors (1).

28747679 is an equidigital number, since it uses as much as digits as its factorization.

28747679 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1185408, while the sum is 50.

The square root of 28747679 is about 5361.6862086474. The cubic root of 28747679 is about 306.3380397167.

The spelling of 28747679 in words is "twenty-eight million, seven hundred forty-seven thousand, six hundred seventy-nine".