28768765 has 8 divisors (see below), whose sum is σ = 34583040. Its totient is φ = 22974672.

The previous prime is 28768687. The next prime is 28768799. The reversal of 28768765 is 56786782.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28768765 - 2⁹ = 28768253 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1705 + ... + 7774.

It is an arithmetic number, because the mean of its divisors is an integer number (4322880).

Almost surely, 2^28768765 is an apocalyptic number.

It is an amenable number.

28768765 is a deficient number, since it is larger than the sum of its proper divisors (5814275).

28768765 is an equidigital number, since it uses as much as digits as its factorization.

28768765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10091.

The product of its digits is 1128960, while the sum is 49.

The square root of 28768765 is about 5363.6522072185. The cubic root of 28768765 is about 306.4129195617.

The spelling of 28768765 in words is "twenty-eight million, seven hundred sixty-eight thousand, seven hundred sixty-five".