28357688833 has 2 divisors, whose sum is σ = 28357688834. Its totient is φ = 28357688832.

The previous prime is 28357688819. The next prime is 28357688861. The reversal of 28357688833 is 33888675382.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27926420544 + 431268289 = 167112^2 + 20767^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28357688833 is a prime.

It is not a weakly prime, because it can be changed into another prime (28357688893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14178844416 + 14178844417.

It is an arithmetic number, because the mean of its divisors is an integer number (14178844417).

Almost surely, 2^28357688833 is an apocalyptic number.

It is an amenable number.

28357688833 is a deficient number, since it is larger than the sum of its proper divisors (1).

28357688833 is an equidigital number, since it uses as much as digits as its factorization.

28357688833 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46448640, while the sum is 61.

The spelling of 28357688833 in words is "twenty-eight billion, three hundred fifty-seven million, six hundred eighty-eight thousand, eight hundred thirty-three".