6393921444 has 27 divisors (see below), whose sum is σ = 16163625387. Its totient is φ = 2131147224.

The previous prime is 6393921433. The next prime is 6393921449. The reversal of 6393921444 is 4441293936.

The square root of 6393921444 is 79962.

It is a perfect power (a square), and thus also a powerful number.

6393921444 is a `hidden beast` number, since 6 + 393 + 9 + 214 + 44 = 666.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 6393921444.

It is not an unprimeable number, because it can be changed into a prime (6393921449) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 473109 + ... + 486435.

Almost surely, 2^6393921444 is an apocalyptic number.

6393921444 is the 79962-nd square number.

It is an amenable number.

6393921444 is an abundant number, since it is smaller than the sum of its proper divisors (9769703943).

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

6393921444 is an equidigital number, since it uses as much as digits as its factorization.

6393921444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26664 (or 13332 counting only the distinct ones).

The product of its digits is 559872, while the sum is 45.

The cubic root of 6393921444 is about 1856.0475523049.

The spelling of 6393921444 in words is "six billion, three hundred ninety-three million, nine hundred twenty-one thousand, four hundred forty-four".