28883780640 has 1152 divisors, whose sum is σ = 126487775232. Its totient is φ = 5892341760.

The previous prime is 28883780609. The next prime is 28883780641. The reversal of 28883780640 is 4608738882.

It is not an unprimeable number, because it can be changed into a prime (28883780641) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 129523569 + ... + 129523791.

It is an arithmetic number, because the mean of its divisors is an integer number (109798416).

Almost surely, 2^28883780640 is an apocalyptic number.

28883780640 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 28883780640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63243887616).

28883780640 is an abundant number, since it is smaller than the sum of its proper divisors (97603994592).

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

28883780640 is a wasteful number, since it uses less digits than its factorization.

28883780640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322 (or 311 counting only the distinct ones).

The product of its (nonzero) digits is 4128768, while the sum is 54.

The spelling of 28883780640 in words is "twenty-eight billion, eight hundred eighty-three million, seven hundred eighty thousand, six hundred forty".