6442478 has 16 divisors (see below), whose sum is σ = 11280384. Its totient is φ = 2702040.

The previous prime is 6442459. The next prime is 6442481. The reversal of 6442478 is 8742446.

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 in 7 ways as a sum of consecutive naturals, for example, 4238 + ... + 5553.

It is an arithmetic number, because the mean of its divisors is an integer number (705024).

Almost surely, 2^6442478 is an apocalyptic number.

6442478 is a deficient number, since it is larger than the sum of its proper divisors (4837906).

6442478 is a wasteful number, since it uses less digits than its factorization.

6442478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9847.

The product of its digits is 43008, while the sum is 35.

The square root of 6442478 is about 2538.2036955296. The cubic root of 6442478 is about 186.0734091860.

Subtracting 6442478 from its reverse (8742446), we obtain a cube (2299968 = 132³).

The spelling of 6442478 in words is "six million, four hundred forty-two thousand, four hundred seventy-eight".