6446478 has 16 divisors (see below), whose sum is σ = 13012560. Its totient is φ = 2128896.

The previous prime is 6446477. The next prime is 6446483. The reversal of 6446478 is 8746446.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6446477) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4275 + ... + 5582.

It is an arithmetic number, because the mean of its divisors is an integer number (813285).

Almost surely, 2^6446478 is an apocalyptic number.

6446478 is an abundant number, since it is smaller than the sum of its proper divisors (6566082).

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

6446478 is a wasteful number, since it uses less digits than its factorization.

6446478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9971.

The product of its digits is 129024, while the sum is 39.

The square root of 6446478 is about 2538.9915320851. The cubic root of 6446478 is about 186.1119109163. Note that the first 3 decimals are identical.

Subtracting 6446478 from its reverse (8746446), we obtain a cube (2299968 = 132³).

The spelling of 6446478 in words is "six million, four hundred forty-six thousand, four hundred seventy-eight".