28107863680 has 384 divisors, whose sum is σ = 76766538240. Its totient is φ = 9824256000.

The previous prime is 28107863669. The next prime is 28107863689. The reversal of 28107863680 is 8636870182.

It is not an unprimeable number, because it can be changed into a prime (28107863689) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 278295630 + ... + 278295730.

It is an arithmetic number, because the mean of its divisors is an integer number (199912860).

Almost surely, 2^28107863680 is an apocalyptic number.

28107863680 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 28107863680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38383269120).

28107863680 is an abundant number, since it is smaller than the sum of its proper divisors (48658674560).

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

28107863680 is a wasteful number, since it uses less digits than its factorization.

28107863680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260 (or 235 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 49.

The spelling of 28107863680 in words is "twenty-eight billion, one hundred seven million, eight hundred sixty-three thousand, six hundred eighty".