28655369 has 2 divisors, whose sum is σ = 28655370. Its totient is φ = 28655368.

The previous prime is 28655359. The next prime is 28655371. The reversal of 28655369 is 96355682.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20748025 + 7907344 = 4555^2 + 2812^2 .

It is a cyclic number.

It is not a de Polignac number, because 28655369 - 2⁸ = 28655113 is a prime.

It is a super-2 number, since 2×28655369² = 1642260345052322, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 28655371, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (28655359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14327684 + 14327685.

It is an arithmetic number, because the mean of its divisors is an integer number (14327685).

Almost surely, 2^28655369 is an apocalyptic number.

It is an amenable number.

28655369 is a deficient number, since it is larger than the sum of its proper divisors (1).

28655369 is an equidigital number, since it uses as much as digits as its factorization.

28655369 is an evil number, because the sum of its binary digits is even.

The product of its digits is 388800, while the sum is 44.

The square root of 28655369 is about 5353.0709877602. The cubic root of 28655369 is about 306.0098000478.

It can be divided in two parts, 286 and 55369, that added together give a palindrome (55655).

The spelling of 28655369 in words is "twenty-eight million, six hundred fifty-five thousand, three hundred sixty-nine".