28277365 has 4 divisors (see below), whose sum is σ = 33932844. Its totient is φ = 22621888.

The previous prime is 28277357. The next prime is 28277371. The reversal of 28277365 is 56377282.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15382084 + 12895281 = 3922^2 + 3591^2 .

It is a cyclic number.

It is not a de Polignac number, because 28277365 - 2³ = 28277357 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 2827732 + ... + 2827741.

It is an arithmetic number, because the mean of its divisors is an integer number (8483211).

Almost surely, 2^28277365 is an apocalyptic number.

It is an amenable number.

28277365 is a deficient number, since it is larger than the sum of its proper divisors (5655479).

28277365 is an equidigital number, since it uses as much as digits as its factorization.

28277365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5655478.

The product of its digits is 141120, while the sum is 40.

The square root of 28277365 is about 5317.6465659162. The cubic root of 28277365 is about 304.6582753385.

The spelling of 28277365 in words is "twenty-eight million, two hundred seventy-seven thousand, three hundred sixty-five".