28768617507 has 24 divisors (see below), whose sum is σ = 44627236176. Its totient is φ = 16436806848.

The previous prime is 28768617503. The next prime is 28768617547. The reversal of 28768617507 is 70571686782.

It is not a de Polignac number, because 28768617507 - 2² = 28768617503 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28768617503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1654953 + ... + 1672245.

It is an arithmetic number, because the mean of its divisors is an integer number (1859468174).

Almost surely, 2^28768617507 is an apocalyptic number.

28768617507 is a deficient number, since it is larger than the sum of its proper divisors (15858618669).

28768617507 is a wasteful number, since it uses less digits than its factorization.

28768617507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28627 (or 28620 counting only the distinct ones).

The product of its (nonzero) digits is 7902720, while the sum is 57.

The spelling of 28768617507 in words is "twenty-eight billion, seven hundred sixty-eight million, six hundred seventeen thousand, five hundred seven".