28568977 has 2 divisors, whose sum is σ = 28568978. Its totient is φ = 28568976.

The previous prime is 28568963. The next prime is 28568987. The reversal of 28568977 is 77986582.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25361296 + 3207681 = 5036^2 + 1791^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28568977 is a prime.

It is not a weakly prime, because it can be changed into another prime (28568927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14284488 + 14284489.

It is an arithmetic number, because the mean of its divisors is an integer number (14284489).

Almost surely, 2^28568977 is an apocalyptic number.

It is an amenable number.

28568977 is a deficient number, since it is larger than the sum of its proper divisors (1).

28568977 is an equidigital number, since it uses as much as digits as its factorization.

28568977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1693440, while the sum is 52.

The square root of 28568977 is about 5344.9955098204. The cubic root of 28568977 is about 305.7019646470.

The spelling of 28568977 in words is "twenty-eight million, five hundred sixty-eight thousand, nine hundred seventy-seven".