28693877839 has 32 divisors (see below), whose sum is σ = 33987340800. Its totient is φ = 23927270400.

The previous prime is 28693877809. The next prime is 28693877851. The reversal of 28693877839 is 93877839682.

It is not a de Polignac number, because 28693877839 - 2⁹ = 28693877327 is a prime.

It is a super-3 number, since 3×28693877839³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28693877809) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 13669212 + ... + 13671310.

It is an arithmetic number, because the mean of its divisors is an integer number (1062104400).

Almost surely, 2^28693877839 is an apocalyptic number.

28693877839 is a deficient number, since it is larger than the sum of its proper divisors (5293462961).

28693877839 is a wasteful number, since it uses less digits than its factorization.

28693877839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3951.

The product of its digits is 219469824, while the sum is 70.

The spelling of 28693877839 in words is "twenty-eight billion, six hundred ninety-three million, eight hundred seventy-seven thousand, eight hundred thirty-nine".