28840478819 has 2 divisors, whose sum is σ = 28840478820. Its totient is φ = 28840478818.

The previous prime is 28840478773. The next prime is 28840478893. The reversal of 28840478819 is 91887404882.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28840478819 is a prime.

It is a super-2 number, since 2×28840478819² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (28840478419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14420239409 + 14420239410.

It is an arithmetic number, because the mean of its divisors is an integer number (14420239410).

Almost surely, 2^28840478819 is an apocalyptic number.

28840478819 is a deficient number, since it is larger than the sum of its proper divisors (1).

28840478819 is an equidigital number, since it uses as much as digits as its factorization.

28840478819 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8257536, while the sum is 59.

The spelling of 28840478819 in words is "twenty-eight billion, eight hundred forty million, four hundred seventy-eight thousand, eight hundred nineteen".