2143439360 has 80 divisors (see below), whose sum is σ = 5172934536. Its totient is φ = 851755008.

The previous prime is 2143439357. The next prime is 2143439399. The reversal of 2143439360 is 639343412.

It can be written as a sum of positive squares in 4 ways, for example, as 2054627584 + 88811776 = 45328^2 + 9424^2 .

It is a tau number, because it is divible by the number of its divisors (80).

It is a self number, because there is not a number n which added to its sum of digits gives 2143439360.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 399254 + ... + 404586.

Almost surely, 2^2143439360 is an apocalyptic number.

2143439360 is a gapful number since it is divisible by the number (20) 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 2143439360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2586467268).

2143439360 is an abundant number, since it is smaller than the sum of its proper divisors (3029495176).

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

2143439360 is an equidigital number, since it uses as much as digits as its factorization.

2143439360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5513 (or 5497 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 35.

The square root of 2143439360 is about 46297.2932254144. The cubic root of 2143439360 is about 1289.3487408329.

The spelling of 2143439360 in words is "two billion, one hundred forty-three million, four hundred thirty-nine thousand, three hundred sixty".