28765793 has 6 divisors (see below), whose sum is σ = 33462306. Its totient is φ = 24656352.

The previous prime is 28765771. The next prime is 28765813. The reversal of 28765793 is 39756782.

It can be written as a sum of positive squares in only one way, i.e., 15311569 + 13454224 = 3913^2 + 3668^2 .

It is not a de Polignac number, because 28765793 - 2⁶ = 28765729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28765703) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 293480 + ... + 293577.

It is an arithmetic number, because the mean of its divisors is an integer number (5577051).

Almost surely, 2^28765793 is an apocalyptic number.

It is an amenable number.

28765793 is a deficient number, since it is larger than the sum of its proper divisors (4696513).

28765793 is an equidigital number, since it uses as much as digits as its factorization.

28765793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 587071 (or 587064 counting only the distinct ones).

The product of its digits is 635040, while the sum is 47.

The square root of 28765793 is about 5363.3751500338. The cubic root of 28765793 is about 306.4023677178.

The spelling of 28765793 in words is "twenty-eight million, seven hundred sixty-five thousand, seven hundred ninety-three".