28317881832 has 16 divisors (see below), whose sum is σ = 70794704640. Its totient is φ = 9439293936.

The previous prime is 28317881777. The next prime is 28317881833. The reversal of 28317881832 is 23818871382.

It is a super-2 number, since 2×28317881832² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28317881833) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 589955848 + ... + 589955895.

It is an arithmetic number, because the mean of its divisors is an integer number (4424669040).

Almost surely, 2^28317881832 is an apocalyptic number.

It is an amenable number.

28317881832 is an abundant number, since it is smaller than the sum of its proper divisors (42476822808).

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

28317881832 is a wasteful number, since it uses less digits than its factorization.

28317881832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1179911752 (or 1179911748 counting only the distinct ones).

The product of its digits is 1032192, while the sum is 51.

The spelling of 28317881832 in words is "twenty-eight billion, three hundred seventeen million, eight hundred eighty-one thousand, eight hundred thirty-two".