28763903808 has 168 divisors, whose sum is σ = 85732269480. Its totient is φ = 9209303040.

The previous prime is 28763903801. The next prime is 28763903813. The reversal of 28763903808 is 80830936782.

It can be written as a sum of positive squares in 4 ways, for example, as 7979491584 + 20784412224 = 89328^2 + 144168^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28763903801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3286318 + ... + 3295058.

Almost surely, 2^28763903808 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 28763903808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42866134740).

28763903808 is an abundant number, since it is smaller than the sum of its proper divisors (56968365672).

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

28763903808 is a wasteful number, since it uses less digits than its factorization.

28763903808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8985 (or 8972 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 54.

The spelling of 28763903808 in words is "twenty-eight billion, seven hundred sixty-three million, nine hundred three thousand, eight hundred eight".