28626865688736 has 384 divisors, whose sum is σ = 102077640322560. Its totient is φ = 7618617409536.

The previous prime is 28626865688689. The next prime is 28626865688767. The reversal of 28626865688736 is 63788656862682.

28626865688736 is a `hidden beast` number, since 28 + 6 + 26 + 8 + 6 + 568 + 8 + 7 + 3 + 6 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8537956 + ... + 11408348.

It is an arithmetic number, because the mean of its divisors is an integer number (265827188340).

Almost surely, 2^{28626865688736} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28626865688736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51038820161280).

28626865688736 is an abundant number, since it is smaller than the sum of its proper divisors (73450774633824).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28626865688736 is a wasteful number, since it uses less digits than its factorization.

28626865688736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2870533 (or 2870519 counting only the distinct ones).

The product of its digits is 13377208320, while the sum is 81.

The spelling of 28626865688736 in words is "twenty-eight trillion, six hundred twenty-six billion, eight hundred sixty-five million, six hundred eighty-eight thousand, seven hundred thirty-six".