28019063808 has 440 divisors, whose sum is σ = 91592671104. Its totient is φ = 8493465600.

The previous prime is 28019063797. The next prime is 28019063819. The reversal of 28019063808 is 80836091082.

28019063808 is a `hidden beast` number, since 2 + 8 + 0 + 1 + 9 + 0 + 638 + 0 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (28019063797) and next prime (28019063819).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 43711168 + ... + 43711808.

Almost surely, 2^28019063808 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 28019063808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45796335552).

28019063808 is an abundant number, since it is smaller than the sum of its proper divisors (63573607296).

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

28019063808 is a wasteful number, since it uses less digits than its factorization.

28019063808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 721 (or 694 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 45.

It can be divided in two parts, 2801 and 9063808, that added together give a palindrome (9066609).

The spelling of 28019063808 in words is "twenty-eight billion, nineteen million, sixty-three thousand, eight hundred eight".