6394438244 has 6 divisors (see below), whose sum is σ = 11190266934. Its totient is φ = 3197219120.

The previous prime is 6394438243. The next prime is 6394438249. The reversal of 6394438244 is 4428344936.

It can be written as a sum of positive squares in only one way, i.e., 6278660644 + 115777600 = 79238^2 + 10760^2 .

It is not an unprimeable number, because it can be changed into a prime (6394438241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 799304777 + ... + 799304784.

It is an arithmetic number, because the mean of its divisors is an integer number (1865044489).

Almost surely, 2^6394438244 is an apocalyptic number.

It is an amenable number.

6394438244 is a deficient number, since it is larger than the sum of its proper divisors (4795828690).

6394438244 is a wasteful number, since it uses less digits than its factorization.

6394438244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1598609565 (or 1598609563 counting only the distinct ones).

The product of its digits is 1990656, while the sum is 47.

The square root of 6394438244 is about 79965.2314696831. The cubic root of 6394438244 is about 1856.0975570655.

The spelling of 6394438244 in words is "six billion, three hundred ninety-four million, four hundred thirty-eight thousand, two hundred forty-four".