28307797056 has 756 divisors, whose sum is σ = 107939976144. Its totient is φ = 7328724480.

The previous prime is 28307797051. The next prime is 28307797069. The reversal of 28307797056 is 65079770382.

It is a tau number, because it is divible by the number of its divisors (756).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 28307796993 and 28307797011.

It is not an unprimeable number, because it can be changed into a prime (28307797051) by changing a digit.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 92207655 + ... + 92207961.

Almost surely, 2^28307797056 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 28307797056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53969988072).

28307797056 is an abundant number, since it is smaller than the sum of its proper divisors (79632179088).

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

28307797056 is a wasteful number, since it uses less digits than its factorization.

28307797056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370 (or 330 counting only the distinct ones).

The product of its (nonzero) digits is 4445280, while the sum is 54.

The spelling of 28307797056 in words is "twenty-eight billion, three hundred seven million, seven hundred ninety-seven thousand, fifty-six".