28520184020 has 24 divisors (see below), whose sum is σ = 60323272800. Its totient is φ = 11326000032.

The previous prime is 28520184013. The next prime is 28520184029. The reversal of 28520184020 is 2048102582.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28520184029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5126750 + ... + 5132309.

It is an arithmetic number, because the mean of its divisors is an integer number (2513469700).

Almost surely, 2^28520184020 is an apocalyptic number.

28520184020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28520184020 is an abundant number, since it is smaller than the sum of its proper divisors (31803088780).

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

28520184020 is a wasteful number, since it uses less digits than its factorization.

28520184020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10259207 (or 10259205 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 32.

The spelling of 28520184020 in words is "twenty-eight billion, five hundred twenty million, one hundred eighty-four thousand, twenty".