28883947493 has 2 divisors, whose sum is σ = 28883947494. Its totient is φ = 28883947492.

The previous prime is 28883947489. The next prime is 28883947511. The reversal of 28883947493 is 39474938882.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15111047329 + 13772900164 = 122927^2 + 117358^2 .

It is a cyclic number.

It is not a de Polignac number, because 28883947493 - 2² = 28883947489 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28883940493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14441973746 + 14441973747.

It is an arithmetic number, because the mean of its divisors is an integer number (14441973747).

Almost surely, 2^28883947493 is an apocalyptic number.

It is an amenable number.

28883947493 is a deficient number, since it is larger than the sum of its proper divisors (1).

28883947493 is an equidigital number, since it uses as much as digits as its factorization.

28883947493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 83607552, while the sum is 65.

The spelling of 28883947493 in words is "twenty-eight billion, eight hundred eighty-three million, nine hundred forty-seven thousand, four hundred ninety-three".