28456722636 has 48 divisors (see below), whose sum is σ = 69957350400. Its totient is φ = 8978150592.

The previous prime is 28456722631. The next prime is 28456722649. The reversal of 28456722636 is 63622765482.

It is not an unprimeable number, because it can be changed into a prime (28456722631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 196581 + ... + 309123.

It is an arithmetic number, because the mean of its divisors is an integer number (1457444800).

Almost surely, 2^28456722636 is an apocalyptic number.

It is an amenable number.

28456722636 is an abundant number, since it is smaller than the sum of its proper divisors (41500627764).

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

28456722636 is a wasteful number, since it uses less digits than its factorization.

28456722636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113678 (or 113676 counting only the distinct ones).

The product of its digits is 5806080, while the sum is 51.

The spelling of 28456722636 in words is "twenty-eight billion, four hundred fifty-six million, seven hundred twenty-two thousand, six hundred thirty-six".