28643108760 has 768 divisors, whose sum is σ = 119081664000. Its totient is φ = 6087674880.

The previous prime is 28643108759. The next prime is 28643108771. The reversal of 28643108760 is 6780134682.

28643108760 is a `hidden beast` number, since 2 + 86 + 431 + 0 + 87 + 60 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 61334047 + ... + 61334513.

It is an arithmetic number, because the mean of its divisors is an integer number (155054250).

Almost surely, 2^28643108760 is an apocalyptic number.

28643108760 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 28643108760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59540832000).

28643108760 is an abundant number, since it is smaller than the sum of its proper divisors (90438555240).

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

28643108760 is a wasteful number, since it uses less digits than its factorization.

28643108760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 581 (or 564 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 45.

The spelling of 28643108760 in words is "twenty-eight billion, six hundred forty-three million, one hundred eight thousand, seven hundred sixty".