28324261680 has 640 divisors, whose sum is σ = 111862840320. Its totient is φ = 5821562880.

The previous prime is 28324261661. The next prime is 28324261681. The reversal of 28324261680 is 8616242382.

It is not an unprimeable number, because it can be changed into a prime (28324261681) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 25087356 + ... + 25088484.

It is an arithmetic number, because the mean of its divisors is an integer number (174785688).

Almost surely, 2^28324261680 is an apocalyptic number.

28324261680 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 28324261680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55931420160).

28324261680 is an abundant number, since it is smaller than the sum of its proper divisors (83538578640).

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

28324261680 is a wasteful number, since it uses less digits than its factorization.

28324261680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1229 (or 1223 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 42.

The spelling of 28324261680 in words is "twenty-eight billion, three hundred twenty-four million, two hundred sixty-one thousand, six hundred eighty".