28645423320 has 64 divisors (see below), whose sum is σ = 86044381920. Its totient is φ = 7629169664.

The previous prime is 28645423319. The next prime is 28645423333. The reversal of 28645423320 is 2332454682.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 54117 + ... + 245396.

Almost surely, 2^28645423320 is an apocalyptic number.

28645423320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28645423320 is an abundant number, since it is smaller than the sum of its proper divisors (57398958600).

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

28645423320 is a wasteful number, since it uses less digits than its factorization.

28645423320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300324 (or 300320 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 39.

The spelling of 28645423320 in words is "twenty-eight billion, six hundred forty-five million, four hundred twenty-three thousand, three hundred twenty".