28320645016 has 32 divisors (see below), whose sum is σ = 58326278400. Its totient is φ = 12831778080.

The previous prime is 28320644977. The next prime is 28320645071. The reversal of 28320645016 is 61054602382.

It is a super-3 number, since 3×28320645016³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4046940 + ... + 4053931.

It is an arithmetic number, because the mean of its divisors is an integer number (1822696200).

Almost surely, 2^28320645016 is an apocalyptic number.

It is an amenable number.

28320645016 is an abundant number, since it is smaller than the sum of its proper divisors (30005633384).

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

28320645016 is a wasteful number, since it uses less digits than its factorization.

28320645016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8100919 (or 8100915 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 37.

The spelling of 28320645016 in words is "twenty-eight billion, three hundred twenty million, six hundred forty-five thousand, sixteen".