28319696833 has 4 divisors (see below), whose sum is σ = 29010421188. Its totient is φ = 27628972480.

The previous prime is 28319696831. The next prime is 28319696851. The reversal of 28319696833 is 33869691382.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5970343824 + 22349353009 = 77268^2 + 149497^2 .

It is a cyclic number.

It is not a de Polignac number, because 28319696833 - 2¹ = 28319696831 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28319696831) 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, 345362116 + ... + 345362197.

It is an arithmetic number, because the mean of its divisors is an integer number (7252605297).

Almost surely, 2^28319696833 is an apocalyptic number.

It is an amenable number.

28319696833 is a deficient number, since it is larger than the sum of its proper divisors (690724355).

28319696833 is an equidigital number, since it uses as much as digits as its factorization.

28319696833 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 690724354.

The product of its digits is 10077696, while the sum is 58.

The spelling of 28319696833 in words is "twenty-eight billion, three hundred nineteen million, six hundred ninety-six thousand, eight hundred thirty-three".