28729892783 has 4 divisors (see below), whose sum is σ = 28753119480. Its totient is φ = 28706666088.

The previous prime is 28729892701. The next prime is 28729892801. The reversal of 28729892783 is 38729892782.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28729892783 - 2¹⁰ = 28729891759 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28729892183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11611493 + ... + 11613966.

It is an arithmetic number, because the mean of its divisors is an integer number (7188279870).

Almost surely, 2^28729892783 is an apocalyptic number.

28729892783 is a deficient number, since it is larger than the sum of its proper divisors (23226697).

28729892783 is a wasteful number, since it uses less digits than its factorization.

28729892783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23226696.

The product of its digits is 48771072, while the sum is 65.

Subtracting 28729892783 from its reverse (38729892782), we obtain a palindrome (9999999999).

The spelling of 28729892783 in words is "twenty-eight billion, seven hundred twenty-nine million, eight hundred ninety-two thousand, seven hundred eighty-three".