28646422572 has 18 divisors (see below), whose sum is σ = 66843020748. Its totient is φ = 9548612088.

The previous prime is 28646422561. The next prime is 28646422603. The reversal of 28646422572 is 27522464682.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 561879 + ... + 610737.

Almost surely, 2^28646422572 is an apocalyptic number.

It is an amenable number.

28646422572 is an abundant number, since it is smaller than the sum of its proper divisors (38196598176).

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

28646422572 is an frugal number, since it uses more digits than its factorization.

28646422572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97725 (or 48864 counting only the distinct ones).

The product of its digits is 2580480, while the sum is 48.

Multiplying 28646422572 by its sum of digits (48), we get a square (1375028283456 = 1172616²).

The spelling of 28646422572 in words is "twenty-eight billion, six hundred forty-six million, four hundred twenty-two thousand, five hundred seventy-two".