28765587323 has 8 divisors (see below), whose sum is σ = 31518884160. Its totient is φ = 26035331080.

The previous prime is 28765587313. The next prime is 28765587337. The reversal of 28765587323 is 32378556782.

It is a happy number.

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

It is not a de Polignac number, because 28765587323 - 2⁶ = 28765587259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28765587313) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 5757533 + ... + 5762526.

It is an arithmetic number, because the mean of its divisors is an integer number (3939860520).

Almost surely, 2^28765587323 is an apocalyptic number.

28765587323 is a deficient number, since it is larger than the sum of its proper divisors (2753296837).

28765587323 is a wasteful number, since it uses less digits than its factorization.

28765587323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11520297.

The product of its digits is 16934400, while the sum is 56.

The spelling of 28765587323 in words is "twenty-eight billion, seven hundred sixty-five million, five hundred eighty-seven thousand, three hundred twenty-three".