28800803639 has 4 divisors (see below), whose sum is σ = 28840096056. Its totient is φ = 28761511224.

The previous prime is 28800803627. The next prime is 28800803693. The reversal of 28800803639 is 93630800882.

It is a happy number.

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 28800803639 - 2¹⁶ = 28800738103 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28800803593 and 28800803602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28800803609) 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 3 ways as a sum of consecutive naturals, for example, 19645109 + ... + 19646574.

It is an arithmetic number, because the mean of its divisors is an integer number (7210024014).

Almost surely, 2^28800803639 is an apocalyptic number.

28800803639 is a deficient number, since it is larger than the sum of its proper divisors (39292417).

28800803639 is an equidigital number, since it uses as much as digits as its factorization.

28800803639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39292416.

The product of its (nonzero) digits is 497664, while the sum is 47.

The spelling of 28800803639 in words is "twenty-eight billion, eight hundred million, eight hundred three thousand, six hundred thirty-nine".