28978933843 has 2 divisors, whose sum is σ = 28978933844. Its totient is φ = 28978933842.

The previous prime is 28978933811. The next prime is 28978933847. The reversal of 28978933843 is 34833987982.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28978933843 - 2⁵ = 28978933811 is a prime.

It is not a weakly prime, because it can be changed into another prime (28978933847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14489466921 + 14489466922.

It is an arithmetic number, because the mean of its divisors is an integer number (14489466922).

Almost surely, 2^28978933843 is an apocalyptic number.

28978933843 is a deficient number, since it is larger than the sum of its proper divisors (1).

28978933843 is an equidigital number, since it uses as much as digits as its factorization.

28978933843 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62705664, while the sum is 64.

The spelling of 28978933843 in words is "twenty-eight billion, nine hundred seventy-eight million, nine hundred thirty-three thousand, eight hundred forty-three".