28768889009 has 16 divisors (see below), whose sum is σ = 32975799168. Its totient is φ = 24586353792.

The previous prime is 28768888961. The next prime is 28768889021. The reversal of 28768889009 is 90098886782.

It is not a de Polignac number, because 28768889009 - 2¹² = 28768884913 is a prime.

It is a super-2 number, since 2×28768889009² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28768889029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3875069 + ... + 3882485.

It is an arithmetic number, because the mean of its divisors is an integer number (2060987448).

Almost surely, 2^28768889009 is an apocalyptic number.

It is an amenable number.

28768889009 is a deficient number, since it is larger than the sum of its proper divisors (4206910159).

28768889009 is a wasteful number, since it uses less digits than its factorization.

28768889009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8984.

The product of its (nonzero) digits is 27869184, while the sum is 65.

The spelling of 28768889009 in words is "twenty-eight billion, seven hundred sixty-eight million, eight hundred eighty-nine thousand, nine".