28768732899 has 4 divisors (see below), whose sum is σ = 38358310536. Its totient is φ = 19179155264.

The previous prime is 28768732897. The next prime is 28768732901. The reversal of 28768732899 is 99823786782.

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

It is an interprime number because it is at equal distance from previous prime (28768732897) and next prime (28768732901).

It is a cyclic number.

It is not a de Polignac number, because 28768732899 - 2¹ = 28768732897 is a prime.

It is a super-2 number, since 2×28768732899² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28768732897) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4794788814 + ... + 4794788819.

It is an arithmetic number, because the mean of its divisors is an integer number (9589577634).

Almost surely, 2^28768732899 is an apocalyptic number.

28768732899 is a deficient number, since it is larger than the sum of its proper divisors (9589577637).

28768732899 is an equidigital number, since it uses as much as digits as its factorization.

28768732899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9589577636.

The product of its digits is 146313216, while the sum is 69.

The spelling of 28768732899 in words is "twenty-eight billion, seven hundred sixty-eight million, seven hundred thirty-two thousand, eight hundred ninety-nine".