5281439688 has 96 divisors (see below), whose sum is σ = 16361991360. Its totient is φ = 1507628160.

The previous prime is 5281439627. The next prime is 5281439717. The reversal of 5281439688 is 8869341825.

5281439688 is a `hidden beast` number, since 52 + 81 + 439 + 6 + 88 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 646606 + ... + 654722.

It is an arithmetic number, because the mean of its divisors is an integer number (170437410).

Almost surely, 2^5281439688 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 5281439688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8180995680).

5281439688 is an abundant number, since it is smaller than the sum of its proper divisors (11080551672).

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

5281439688 is a wasteful number, since it uses less digits than its factorization.

5281439688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9427 (or 9420 counting only the distinct ones).

The product of its digits is 3317760, while the sum is 54.

The square root of 5281439688 is about 72673.5143501400. The cubic root of 5281439688 is about 1741.4757911478.

The spelling of 5281439688 in words is "five billion, two hundred eighty-one million, four hundred thirty-nine thousand, six hundred eighty-eight".