6442730680 has 32 divisors (see below), whose sum is σ = 14498760240. Its totient is φ = 2576627200.

The previous prime is 6442730639. The next prime is 6442730681. The reversal of 6442730680 is 860372446.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6442730681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 287232 + ... + 308848.

Almost surely, 2^6442730680 is an apocalyptic number.

It is an amenable number.

6442730680 is an abundant number, since it is smaller than the sum of its proper divisors (8056029560).

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

6442730680 is a wasteful number, since it uses less digits than its factorization.

6442730680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29079 (or 29075 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 40.

The square root of 6442730680 is about 80266.6224529225. The cubic root of 6442730680 is about 1860.7584181176.

The spelling of 6442730680 in words is "six billion, four hundred forty-two million, seven hundred thirty thousand, six hundred eighty".