28566877 has 2 divisors, whose sum is σ = 28566878. Its totient is φ = 28566876.

The previous prime is 28566847. The next prime is 28566893. The reversal of 28566877 is 77866582.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27604516 + 962361 = 5254^2 + 981^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28566877 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28566877.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28566847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14283438 + 14283439.

It is an arithmetic number, because the mean of its divisors is an integer number (14283439).

Almost surely, 2^28566877 is an apocalyptic number.

It is an amenable number.

28566877 is a deficient number, since it is larger than the sum of its proper divisors (1).

28566877 is an equidigital number, since it uses as much as digits as its factorization.

28566877 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1128960, while the sum is 49.

The square root of 28566877 is about 5344.7990607693. The cubic root of 28566877 is about 305.6944741226.

The spelling of 28566877 in words is "twenty-eight million, five hundred sixty-six thousand, eight hundred seventy-seven".