28642345326 has 48 divisors (see below), whose sum is σ = 74007558144. Its totient is φ = 7827720912.

The previous prime is 28642345309. The next prime is 28642345337. The reversal of 28642345326 is 62354324682.

28642345326 is a `hidden beast` number, since 2 + 86 + 4 + 2 + 34 + 532 + 6 = 666.

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, 4938846 + ... + 4944641.

It is an arithmetic number, because the mean of its divisors is an integer number (1541824128).

Almost surely, 2^28642345326 is an apocalyptic number.

28642345326 is an abundant number, since it is smaller than the sum of its proper divisors (45365212818).

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

28642345326 is a wasteful number, since it uses less digits than its factorization.

28642345326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9883525 (or 9883522 counting only the distinct ones).

The product of its digits is 1658880, while the sum is 45.

The spelling of 28642345326 in words is "twenty-eight billion, six hundred forty-two million, three hundred forty-five thousand, three hundred twenty-six".