28378342226 has 8 divisors (see below), whose sum is σ = 45841937484. Its totient is φ = 13097696400.

The previous prime is 28378342193. The next prime is 28378342247. The reversal of 28378342226 is 62224387382.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 23005305625 + 5373036601 = 151675^2 + 73301^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 545737325 + ... + 545737376.

Almost surely, 2^28378342226 is an apocalyptic number.

28378342226 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

28378342226 is a deficient number, since it is larger than the sum of its proper divisors (17463595258).

28378342226 is a wasteful number, since it uses less digits than its factorization.

28378342226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1091474716.

The product of its digits is 1548288, while the sum is 47.

The spelling of 28378342226 in words is "twenty-eight billion, three hundred seventy-eight million, three hundred forty-two thousand, two hundred twenty-six".