28317321312 has 96 divisors (see below), whose sum is σ = 85572329472. Its totient is φ = 8031581184.

The previous prime is 28317321301. The next prime is 28317321313. The reversal of 28317321312 is 21312371382.

It is a tau number, because it is divible by the number of its divisors (96).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28317321313) 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, 61728 + ... + 245855.

It is an arithmetic number, because the mean of its divisors is an integer number (891378432).

Almost surely, 2^28317321312 is an apocalyptic number.

It is an amenable number.

28317321312 is an abundant number, since it is smaller than the sum of its proper divisors (57255008160).

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

28317321312 is a wasteful number, since it uses less digits than its factorization.

28317321312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307740 (or 307732 counting only the distinct ones).

The product of its digits is 12096, while the sum is 33.

Adding to 28317321312 its reverse (21312371382), we get a palindrome (49629692694).

The spelling of 28317321312 in words is "twenty-eight billion, three hundred seventeen million, three hundred twenty-one thousand, three hundred twelve".