6444478 has 4 divisors (see below), whose sum is σ = 9666720. Its totient is φ = 3222238.

The previous prime is 6444443. The next prime is 6444481. The reversal of 6444478 is 8744446.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1611118 + ... + 1611121.

It is an arithmetic number, because the mean of its divisors is an integer number (2416680).

Almost surely, 2^6444478 is an apocalyptic number.

6444478 is a deficient number, since it is larger than the sum of its proper divisors (3222242).

6444478 is a wasteful number, since it uses less digits than its factorization.

6444478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3222241.

The product of its digits is 86016, while the sum is 37.

The square root of 6444478 is about 2538.5976443698. The cubic root of 6444478 is about 186.0926620426.

Subtracting 6444478 from its reverse (8744446), we obtain a cube (2299968 = 132³).

The spelling of 6444478 in words is "six million, four hundred forty-four thousand, four hundred seventy-eight".