28664680422 has 48 divisors (see below), whose sum is σ = 66706777152. Its totient is φ = 8187757200.

The previous prime is 28664680409. The next prime is 28664680519. The reversal of 28664680422 is 22408646682.

It is a happy number.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 1356913 + ... + 1377875.

It is an arithmetic number, because the mean of its divisors is an integer number (1389724524).

Almost surely, 2^28664680422 is an apocalyptic number.

28664680422 is an abundant number, since it is smaller than the sum of its proper divisors (38042096730).

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

28664680422 is a wasteful number, since it uses less digits than its factorization.

28664680422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25633 (or 25626 counting only the distinct ones).

The product of its (nonzero) digits is 1769472, while the sum is 48.

The spelling of 28664680422 in words is "twenty-eight billion, six hundred sixty-four million, six hundred eighty thousand, four hundred twenty-two".