28103813568 has 448 divisors, whose sum is σ = 90284198400. Its totient is φ = 8539914240.

The previous prime is 28103813567. The next prime is 28103813587. The reversal of 28103813568 is 86531830182.

28103813568 is a `hidden beast` number, since 2 + 8 + 1 + 0 + 3 + 81 + 3 + 568 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28103813567) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 214532863 + ... + 214532993.

Almost surely, 2^28103813568 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 28103813568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45142099200).

28103813568 is an abundant number, since it is smaller than the sum of its proper divisors (62180384832).

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

28103813568 is a wasteful number, since it uses less digits than its factorization.

28103813568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345 (or 329 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 45.

The spelling of 28103813568 in words is "twenty-eight billion, one hundred three million, eight hundred thirteen thousand, five hundred sixty-eight".