6444427 has 4 divisors (see below), whose sum is σ = 7030296. Its totient is φ = 5858560.

The previous prime is 6444413. The next prime is 6444437. The reversal of 6444427 is 7244446.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6444427 - 2⁷ = 6444299 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6444437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 292918 + ... + 292939.

It is an arithmetic number, because the mean of its divisors is an integer number (1757574).

Almost surely, 2^6444427 is an apocalyptic number.

6444427 is a deficient number, since it is larger than the sum of its proper divisors (585869).

6444427 is a wasteful number, since it uses less digits than its factorization.

6444427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 585868.

The product of its digits is 21504, while the sum is 31.

The square root of 6444427 is about 2538.5875994340. The cubic root of 6444427 is about 186.0921711442.

The spelling of 6444427 in words is "six million, four hundred forty-four thousand, four hundred twenty-seven".