28143711180 has 288 divisors, whose sum is σ = 94657792320. Its totient is φ = 6724362240.

The previous prime is 28143711179. The next prime is 28143711227. The reversal of 28143711180 is 8111734182.

28143711180 is a `hidden beast` number, since 281 + 4 + 371 + 1 + 1 + 8 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 22353391 + ... + 22354649.

It is an arithmetic number, because the mean of its divisors is an integer number (328672890).

Almost surely, 2^28143711180 is an apocalyptic number.

28143711180 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 28143711180, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47328896160).

28143711180 is an abundant number, since it is smaller than the sum of its proper divisors (66514081140).

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

28143711180 is a wasteful number, since it uses less digits than its factorization.

28143711180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1561 (or 1556 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 36.

The spelling of 28143711180 in words is "twenty-eight billion, one hundred forty-three million, seven hundred eleven thousand, one hundred eighty".