28163912285520 has 240 divisors, whose sum is σ = 103226514955200. Its totient is φ = 6824691578880.

The previous prime is 28163912285497. The next prime is 28163912285549. The reversal of 28163912285520 is 2558221936182.

28163912285520 is a `hidden beast` number, since 2 + 8 + 1 + 6 + 3 + 91 + 2 + 28 + 5 + 520 = 666.

It is a tau number, because it is divible by the number of its divisors (240).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 17764716 + ... + 19285044.

It is an arithmetic number, because the mean of its divisors is an integer number (430110478980).

Almost surely, 2^{28163912285520} is an apocalyptic number.

28163912285520 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 28163912285520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51613257477600).

28163912285520 is an abundant number, since it is smaller than the sum of its proper divisors (75062602669680).

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

28163912285520 is a wasteful number, since it uses less digits than its factorization.

28163912285520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1522698 (or 1522689 counting only the distinct ones).

The product of its (nonzero) digits is 4147200, while the sum is 54.

The spelling of 28163912285520 in words is "twenty-eight trillion, one hundred sixty-three billion, nine hundred twelve million, two hundred eighty-five thousand, five hundred twenty".