28890308833 has 2 divisors, whose sum is σ = 28890308834. Its totient is φ = 28890308832.

The previous prime is 28890308831. The next prime is 28890308891. The reversal of 28890308833 is 33880309882.

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., 16402693329 + 12487615504 = 128073^2 + 111748^2 .

It is a cyclic number.

It is not a de Polignac number, because 28890308833 - 2¹ = 28890308831 is a prime.

It is a super-2 number, since 2×28890308833² (a number of 22 digits) contains 22 as substring.

Together with 28890308831, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (28890308831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14445154416 + 14445154417.

It is an arithmetic number, because the mean of its divisors is an integer number (14445154417).

Almost surely, 2^28890308833 is an apocalyptic number.

It is an amenable number.

28890308833 is a deficient number, since it is larger than the sum of its proper divisors (1).

28890308833 is an equidigital number, since it uses as much as digits as its factorization.

28890308833 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1990656, while the sum is 52.

The spelling of 28890308833 in words is "twenty-eight billion, eight hundred ninety million, three hundred eight thousand, eight hundred thirty-three".