6439342320 has 160 divisors (see below), whose sum is σ = 22895677440. Its totient is φ = 1661748480.

The previous prime is 6439342319. The next prime is 6439342333. The reversal of 6439342320 is 232439346.

6439342320 is a `hidden beast` number, since 643 + 9 + 3 + 4 + 2 + 3 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 18877 + ... + 115043.

It is an arithmetic number, because the mean of its divisors is an integer number (143097984).

Almost surely, 2^6439342320 is an apocalyptic number.

6439342320 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6439342320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11447838720).

6439342320 is an abundant number, since it is smaller than the sum of its proper divisors (16456335120).

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

6439342320 is a wasteful number, since it uses less digits than its factorization.

6439342320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96220 (or 96208 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 36.

The square root of 6439342320 is about 80245.5127717432. The cubic root of 6439342320 is about 1860.4321576480.

The spelling of 6439342320 in words is "six billion, four hundred thirty-nine million, three hundred forty-two thousand, three hundred twenty".