28020041181840 has 640 divisors, whose sum is σ = 93680116088832. Its totient is φ = 6909946306560.

The previous prime is 28020041181833. The next prime is 28020041181841. The reversal of 28020041181840 is 4818114002082.

It is not an unprimeable number, because it can be changed into a prime (28020041181841) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 31949875482 + ... + 31949876358.

Almost surely, 2^{28020041181840} is an apocalyptic number.

28020041181840 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 28020041181840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46840058044416).

28020041181840 is an abundant number, since it is smaller than the sum of its proper divisors (65660074906992).

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

28020041181840 is a wasteful number, since it uses less digits than its factorization.

28020041181840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1767 (or 1761 counting only the distinct ones).

The product of its (nonzero) digits is 32768, while the sum is 39.

The spelling of 28020041181840 in words is "twenty-eight trillion, twenty billion, forty-one million, one hundred eighty-one thousand, eight hundred forty".