28109355816960 has 1440 divisors, whose sum is σ = 116581213148400. Its totient is φ = 6455299276800.

The previous prime is 28109355816943. The next prime is 28109355817013. The reversal of 28109355816960 is 6961855390182.

28109355816960 is a `hidden beast` number, since 2 + 8 + 1 + 0 + 9 + 3 + 558 + 16 + 9 + 60 = 666.

It is a tau number, because it is divible by the number of its divisors (1440).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 1906875190 + ... + 1906889930.

Almost surely, 2^{28109355816960} is an apocalyptic number.

28109355816960 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28109355816960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58290606574200).

28109355816960 is an abundant number, since it is smaller than the sum of its proper divisors (88471857331440).

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

28109355816960 is a wasteful number, since it uses less digits than its factorization.

28109355816960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14821 (or 14781 counting only the distinct ones).

The product of its (nonzero) digits is 27993600, while the sum is 63.

The spelling of 28109355816960 in words is "twenty-eight trillion, one hundred nine billion, three hundred fifty-five million, eight hundred sixteen thousand, nine hundred sixty".