28569371 has 2 divisors, whose sum is σ = 28569372. Its totient is φ = 28569370.

The previous prime is 28569341. The next prime is 28569377. The reversal of 28569371 is 17396582.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28569371 - 2¹⁴ = 28552987 is a prime.

It is not a weakly prime, because it can be changed into another prime (28569377) 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, 14284685 + 14284686.

It is an arithmetic number, because the mean of its divisors is an integer number (14284686).

Almost surely, 2^28569371 is an apocalyptic number.

28569371 is a deficient number, since it is larger than the sum of its proper divisors (1).

28569371 is an equidigital number, since it uses as much as digits as its factorization.

28569371 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90720, while the sum is 41.

The square root of 28569371 is about 5345.0323665999. The cubic root of 28569371 is about 305.7033699711.

The spelling of 28569371 in words is "twenty-eight million, five hundred sixty-nine thousand, three hundred seventy-one".