28490192881920 has 1080 divisors, whose sum is σ = 128061173752512. Its totient is φ = 5920021831680.

The previous prime is 28490192881919. The next prime is 28490192881937. The reversal of 28490192881920 is 2918829109482.

28490192881920 is a `hidden beast` number, since 2 + 84 + 90 + 1 + 9 + 288 + 192 + 0 = 666.

28490192881920 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (1080).

It is a Harshad number since it is a multiple of its sum of digits (63).

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, 87654747 + ... + 87979173.

Almost surely, 2^{28490192881920} is an apocalyptic number.

28490192881920 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 28490192881920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64030586876256).

28490192881920 is an abundant number, since it is smaller than the sum of its proper divisors (99570980870592).

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

28490192881920 is a wasteful number, since it uses less digits than its factorization.

28490192881920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324489 (or 324455 counting only the distinct ones).

The product of its (nonzero) digits is 11943936, while the sum is 63.

The spelling of 28490192881920 in words is "twenty-eight trillion, four hundred ninety billion, one hundred ninety-two million, eight hundred eighty-one thousand, nine hundred twenty".