28020545498880 has 720 divisors, whose sum is σ = 112905867368448. Its totient is φ = 6573726720000.

The previous prime is 28020545498873. The next prime is 28020545498917. The reversal of 28020545498880 is 8889454502082.

28020545498880 is a `hidden beast` number, since 2 + 8 + 0 + 2 + 0 + 5 + 4 + 549 + 8 + 8 + 80 = 666.

It is a tau number, because it is divible by the number of its divisors (720).

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 79 ways as a sum of consecutive naturals, for example, 34958605 + ... + 35751155.

Almost surely, 2^{28020545498880} is an apocalyptic number.

28020545498880 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 28020545498880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56452933684224).

28020545498880 is an abundant number, since it is smaller than the sum of its proper divisors (84885321869568).

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

28020545498880 is a wasteful number, since it uses less digits than its factorization.

28020545498880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 792626 (or 792603 counting only the distinct ones).

The product of its (nonzero) digits is 58982400, while the sum is 63.

The spelling of 28020545498880 in words is "twenty-eight trillion, twenty billion, five hundred forty-five million, four hundred ninety-eight thousand, eight hundred eighty".