28704170880 has 1792 divisors, whose sum is σ = 138706421760. Its totient is φ = 5494210560.

The previous prime is 28704170861. The next prime is 28704170909. The reversal of 28704170880 is 8807140782.

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 polite number, since it can be written in 223 ways as a sum of consecutive naturals, for example, 610727017 + ... + 610727063.

Almost surely, 2^28704170880 is an apocalyptic number.

28704170880 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 28704170880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69353210880).

28704170880 is an abundant number, since it is smaller than the sum of its proper divisors (110002250880).

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

28704170880 is a wasteful number, since it uses less digits than its factorization.

28704170880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119 (or 92 counting only the distinct ones).

The product of its (nonzero) digits is 200704, while the sum is 45.

The spelling of 28704170880 in words is "twenty-eight billion, seven hundred four million, one hundred seventy thousand, eight hundred eighty".