28318006321 has 8 divisors (see below), whose sum is σ = 31645843488. Its totient is φ = 25115748000.

The previous prime is 28318006303. The next prime is 28318006349. The reversal of 28318006321 is 12360081382.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28318006321 - 2²⁵ = 28284451889 is a prime.

It is a super-3 number, since 3×28318006321³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28318006121) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 31394235 + ... + 31395136.

It is an arithmetic number, because the mean of its divisors is an integer number (3955730436).

Almost surely, 2^28318006321 is an apocalyptic number.

It is an amenable number.

28318006321 is a deficient number, since it is larger than the sum of its proper divisors (3327837167).

28318006321 is a wasteful number, since it uses less digits than its factorization.

28318006321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62789423.

The product of its (nonzero) digits is 13824, while the sum is 34.

The spelling of 28318006321 in words is "twenty-eight billion, three hundred eighteen million, six thousand, three hundred twenty-one".