28866779 has 2 divisors, whose sum is σ = 28866780. Its totient is φ = 28866778.

The previous prime is 28866743. The next prime is 28866809. The reversal of 28866779 is 97766882.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28866779 - 2¹⁶ = 28801243 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 28866779.

It is not a weakly prime, because it can be changed into another prime (28866379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14433389 + 14433390.

It is an arithmetic number, because the mean of its divisors is an integer number (14433390).

Almost surely, 2^28866779 is an apocalyptic number.

28866779 is a deficient number, since it is larger than the sum of its proper divisors (1).

28866779 is an equidigital number, since it uses as much as digits as its factorization.

28866779 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2032128, while the sum is 53.

The square root of 28866779 is about 5372.7813095268. The cubic root of 28866779 is about 306.7605038662.

The spelling of 28866779 in words is "twenty-eight million, eight hundred sixty-six thousand, seven hundred seventy-nine".