28599781793 has 12 divisors (see below), whose sum is σ = 31445501220. Its totient is φ = 25992046080.

The previous prime is 28599781789. The next prime is 28599781799. The reversal of 28599781793 is 39718799582.

It can be written as a sum of positive squares in 2 ways, for example, as 1476326929 + 27123454864 = 38423^2 + 164692^2 .

It is not a de Polignac number, because 28599781793 - 2² = 28599781789 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28599781799) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 393521 + ... + 460497.

It is an arithmetic number, because the mean of its divisors is an integer number (2620458435).

Almost surely, 2^28599781793 is an apocalyptic number.

It is an amenable number.

28599781793 is a deficient number, since it is larger than the sum of its proper divisors (2845719427).

28599781793 is a wasteful number, since it uses less digits than its factorization.

28599781793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70528 (or 70517 counting only the distinct ones).

The product of its digits is 68584320, while the sum is 68.

The spelling of 28599781793 in words is "twenty-eight billion, five hundred ninety-nine million, seven hundred eighty-one thousand, seven hundred ninety-three".