28678716733 has 4 divisors (see below), whose sum is σ = 28784542528. Its totient is φ = 28572890940.

The previous prime is 28678716727. The next prime is 28678716811. The reversal of 28678716733 is 33761787682.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28678716733 - 2⁵ = 28678716701 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 (28678716713) 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, 52912491 + ... + 52913032.

It is an arithmetic number, because the mean of its divisors is an integer number (7196135632).

Almost surely, 2^28678716733 is an apocalyptic number.

It is an amenable number.

28678716733 is a deficient number, since it is larger than the sum of its proper divisors (105825795).

28678716733 is a wasteful number, since it uses less digits than its factorization.

28678716733 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105825794.

The product of its digits is 14224896, while the sum is 58.

The spelling of 28678716733 in words is "twenty-eight billion, six hundred seventy-eight million, seven hundred sixteen thousand, seven hundred thirty-three".