28684687360 has 384 divisors, whose sum is σ = 83328860160. Its totient is φ = 9264955392.

The previous prime is 28684687327. The next prime is 28684687387. The reversal of 28684687360 is 6378648682.

It is a super-2 number, since 2×28684687360² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28684687295 and 28684687304.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 209377212 + ... + 209377348.

It is an arithmetic number, because the mean of its divisors is an integer number (217002240).

Almost surely, 2^28684687360 is an apocalyptic number.

28684687360 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 28684687360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41664430080).

28684687360 is an abundant number, since it is smaller than the sum of its proper divisors (54644172800).

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

28684687360 is a wasteful number, since it uses less digits than its factorization.

28684687360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321 (or 301 counting only the distinct ones).

The product of its (nonzero) digits is 18579456, while the sum is 58.

The spelling of 28684687360 in words is "twenty-eight billion, six hundred eighty-four million, six hundred eighty-seven thousand, three hundred sixty".