28321785520008 has 64 divisors (see below), whose sum is σ = 71264224542720. Its totient is φ = 9379308556800.

The previous prime is 28321785520001. The next prime is 28321785520079. The reversal of 28321785520008 is 80002558712382.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (28321785520001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30404868 + ... + 31322508.

It is an arithmetic number, because the mean of its divisors is an integer number (1113503508480).

Almost surely, 2^{28321785520008} is an apocalyptic number.

It is an amenable number.

28321785520008 is an abundant number, since it is smaller than the sum of its proper divisors (42942439022712).

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

28321785520008 is a wasteful number, since it uses less digits than its factorization.

28321785520008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 925998 (or 925994 counting only the distinct ones).

The product of its (nonzero) digits is 2150400, while the sum is 51.

The spelling of 28321785520008 in words is "twenty-eight trillion, three hundred twenty-one billion, seven hundred eighty-five million, five hundred twenty thousand, eight".