28626227216 has 20 divisors (see below), whose sum is σ = 55473440172. Its totient is φ = 14310500736.

The previous prime is 28626227213. The next prime is 28626227219. The reversal of 28626227216 is 61272262682.

It is an interprime number because it is at equal distance from previous prime (28626227213) and next prime (28626227219).

It can be written as a sum of positive squares in 2 ways, for example, as 1730227216 + 26896000000 = 41596^2 + 164000^2 .

It is a super-2 number, since 2×28626227216² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (28626227213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71351 + ... + 249686.

Almost surely, 2^28626227216 is an apocalyptic number.

It is an amenable number.

28626227216 is a deficient number, since it is larger than the sum of its proper divisors (26847212956).

28626227216 is a wasteful number, since it uses less digits than its factorization.

28626227216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326618 (or 326612 counting only the distinct ones).

The product of its digits is 387072, while the sum is 44.

Adding to 28626227216 its reverse (61272262682), we get a palindrome (89898489898).

The spelling of 28626227216 in words is "twenty-eight billion, six hundred twenty-six million, two hundred twenty-seven thousand, two hundred sixteen".