28378342227 has 12 divisors (see below), whose sum is σ = 37911642200. Its totient is φ = 18882040320.

The previous prime is 28378342193. The next prime is 28378342247. The reversal of 28378342227 is 72224387382.

It is not a de Polignac number, because 28378342227 - 2⁶ = 28378342163 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28378342247) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 796899 + ... + 831747.

Almost surely, 2^28378342227 is an apocalyptic number.

28378342227 is a deficient number, since it is larger than the sum of its proper divisors (9533299973).

28378342227 is an frugal number, since it uses more digits than its factorization.

28378342227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35894 (or 35373 counting only the distinct ones).

The product of its digits is 1806336, while the sum is 48.

The spelling of 28378342227 in words is "twenty-eight billion, three hundred seventy-eight million, three hundred forty-two thousand, two hundred twenty-seven".