28765255 has 4 divisors (see below), whose sum is σ = 34518312. Its totient is φ = 23012200.

The previous prime is 28765223. The next prime is 28765277. The reversal of 28765255 is 55256782.

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

It is not a de Polignac number, because 28765255 - 2⁵ = 28765223 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2876521 + ... + 2876530.

It is an arithmetic number, because the mean of its divisors is an integer number (8629578).

Almost surely, 2^28765255 is an apocalyptic number.

28765255 is a deficient number, since it is larger than the sum of its proper divisors (5753057).

28765255 is an equidigital number, since it uses as much as digits as its factorization.

28765255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5753056.

The product of its digits is 168000, while the sum is 40.

The square root of 28765255 is about 5363.3249948143. The cubic root of 28765255 is about 306.4004575149.

The spelling of 28765255 in words is "twenty-eight million, seven hundred sixty-five thousand, two hundred fifty-five".