28683963648 has 180 divisors, whose sum is σ = 86739494688. Its totient is φ = 9426170880.

The previous prime is 28683963641. The next prime is 28683963683. The reversal of 28683963648 is 84636938682.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28683963641) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1462515 + ... + 1481997.

Almost surely, 2^28683963648 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28683963648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43369747344).

28683963648 is an abundant number, since it is smaller than the sum of its proper divisors (58055531040).

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

28683963648 is an equidigital number, since it uses as much as digits as its factorization.

28683963648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19582 (or 19559 counting only the distinct ones).

The product of its digits is 71663616, while the sum is 63.

The spelling of 28683963648 in words is "twenty-eight billion, six hundred eighty-three million, nine hundred sixty-three thousand, six hundred forty-eight".