6442440460 has 48 divisors (see below), whose sum is σ = 13994652672. Its totient is φ = 2488651200.

The previous prime is 6442440443. The next prime is 6442440463. The reversal of 6442440460 is 640442446.

It is not an unprimeable number, because it can be changed into a prime (6442440463) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 293839 + ... + 315001.

It is an arithmetic number, because the mean of its divisors is an integer number (291555264).

Almost surely, 2^6442440460 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 6442440460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6997326336).

6442440460 is an abundant number, since it is smaller than the sum of its proper divisors (7552212212).

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

6442440460 is a wasteful number, since it uses less digits than its factorization.

6442440460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21694 (or 21692 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 34.

The square root of 6442440460 is about 80264.8145827298. The cubic root of 6442440460 is about 1860.7304777176.

The spelling of 6442440460 in words is "six billion, four hundred forty-two million, four hundred forty thousand, four hundred sixty".