28168380660 has 192 divisors, whose sum is σ = 92384151552. Its totient is φ = 6278598144.

The previous prime is 28168380637. The next prime is 28168380683. The reversal of 28168380660 is 6608386182.

It is an interprime number because it is at equal distance from previous prime (28168380637) and next prime (28168380683).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 19738867 + ... + 19740293.

It is an arithmetic number, because the mean of its divisors is an integer number (481167456).

Almost surely, 2^28168380660 is an apocalyptic number.

28168380660 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 28168380660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46192075776).

28168380660 is an abundant number, since it is smaller than the sum of its proper divisors (64215770892).

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

28168380660 is a wasteful number, since it uses less digits than its factorization.

28168380660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2582 (or 2580 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 48.

The spelling of 28168380660 in words is "twenty-eight billion, one hundred sixty-eight million, three hundred eighty thousand, six hundred sixty".