28108318680 has 320 divisors, whose sum is σ = 102495808800. Its totient is φ = 6867763200.

The previous prime is 28108318673. The next prime is 28108318697. The reversal of 28108318680 is 8681380182.

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 (19) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 5852280 + ... + 5857080.

Almost surely, 2^28108318680 is an apocalyptic number.

28108318680 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 28108318680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51247904400).

28108318680 is an abundant number, since it is smaller than the sum of its proper divisors (74387490120).

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

28108318680 is a wasteful number, since it uses less digits than its factorization.

28108318680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4976 (or 4963 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 45.

The spelling of 28108318680 in words is "twenty-eight billion, one hundred eight million, three hundred eighteen thousand, six hundred eighty".