28493826817 has 4 divisors (see below), whose sum is σ = 28522814400. Its totient is φ = 28464839236.

The previous prime is 28493826761. The next prime is 28493826821. The reversal of 28493826817 is 71862839482.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28493826817 - 2¹¹ = 28493824769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28493826017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14492317 + ... + 14494282.

It is an arithmetic number, because the mean of its divisors is an integer number (7130703600).

Almost surely, 2^28493826817 is an apocalyptic number.

It is an amenable number.

28493826817 is a deficient number, since it is larger than the sum of its proper divisors (28987583).

28493826817 is an equidigital number, since it uses as much as digits as its factorization.

28493826817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28987582.

The product of its digits is 9289728, while the sum is 58.

The spelling of 28493826817 in words is "twenty-eight billion, four hundred ninety-three million, eight hundred twenty-six thousand, eight hundred seventeen".