28734807999 has 4 divisors (see below), whose sum is σ = 38313077336. Its totient is φ = 19156538664.

The previous prime is 28734807953. The next prime is 28734808009. The reversal of 28734807999 is 99970843782.

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

It is not a de Polignac number, because 28734807999 - 2¹⁵ = 28734775231 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 (28734805999) 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, 4789134664 + ... + 4789134669.

It is an arithmetic number, because the mean of its divisors is an integer number (9578269334).

Almost surely, 2^28734807999 is an apocalyptic number.

28734807999 is a deficient number, since it is larger than the sum of its proper divisors (9578269337).

28734807999 is an equidigital number, since it uses as much as digits as its factorization.

28734807999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9578269336.

The product of its (nonzero) digits is 54867456, while the sum is 66.

The spelling of 28734807999 in words is "twenty-eight billion, seven hundred thirty-four million, eight hundred seven thousand, nine hundred ninety-nine".