28306443226 has 8 divisors (see below), whose sum is σ = 42523902324. Its totient is φ = 14131809120.

The previous prime is 28306443223. The next prime is 28306443227. The reversal of 28306443226 is 62234460382.

It can be written as a sum of positive squares in 2 ways, for example, as 20858580625 + 7447862601 = 144425^2 + 86301^2 .

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

It is a super-2 number, since 2×28306443226² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28306443223) 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, 10704595 + ... + 10707238.

Almost surely, 2^28306443226 is an apocalyptic number.

28306443226 is a deficient number, since it is larger than the sum of its proper divisors (14217459098).

28306443226 is a wasteful number, since it uses less digits than its factorization.

28306443226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21412496.

The product of its (nonzero) digits is 331776, while the sum is 40.

The spelling of 28306443226 in words is "twenty-eight billion, three hundred six million, four hundred forty-three thousand, two hundred twenty-six".