5439985944 has 128 divisors (see below), whose sum is σ = 14639546880. Its totient is φ = 1680307200.

The previous prime is 5439985937. The next prime is 5439985949. The reversal of 5439985944 is 4495899345.

It is a super-2 number, since 2×5439985944² = 59186894141835142272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5439985949) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3552459 + ... + 3553989.

It is an arithmetic number, because the mean of its divisors is an integer number (114371460).

Almost surely, 2^5439985944 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 5439985944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7319773440).

5439985944 is an abundant number, since it is smaller than the sum of its proper divisors (9199560936).

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

5439985944 is a wasteful number, since it uses less digits than its factorization.

5439985944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1761 (or 1757 counting only the distinct ones).

The product of its digits is 27993600, while the sum is 60.

The square root of 5439985944 is about 73756.2603715780. The cubic root of 5439985944 is about 1758.7303541110.

The spelling of 5439985944 in words is "five billion, four hundred thirty-nine million, nine hundred eighty-five thousand, nine hundred forty-four".