6445478 has 16 divisors (see below), whose sum is σ = 10484880. Its totient is φ = 2954016.

The previous prime is 6445463. The next prime is 6445493. The reversal of 6445478 is 8745446.

It is an interprime number because it is at equal distance from previous prime (6445463) and next prime (6445493).

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 3293 + ... + 4871.

It is an arithmetic number, because the mean of its divisors is an integer number (655305).

Almost surely, 2^6445478 is an apocalyptic number.

6445478 is a deficient number, since it is larger than the sum of its proper divisors (4039402).

6445478 is a wasteful number, since it uses less digits than its factorization.

6445478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1751.

The product of its digits is 107520, while the sum is 38.

The square root of 6445478 is about 2538.7945958663. The cubic root of 6445478 is about 186.1022869772.

Subtracting 6445478 from its reverse (8745446), we obtain a cube (2299968 = 132³).

The spelling of 6445478 in words is "six million, four hundred forty-five thousand, four hundred seventy-eight".