6409478 has 4 divisors (see below), whose sum is σ = 9614220. Its totient is φ = 3204738.

The previous prime is 6409471. The next prime is 6409483. The reversal of 6409478 is 8749046.

It is a happy number.

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

It is a d-powerful number, because it can be written as 6² + 4⁴ + 0 + 9² + 4¹¹ + 7⁶ + 8⁷ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6409471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1602368 + ... + 1602371.

It is an arithmetic number, because the mean of its divisors is an integer number (2403555).

Almost surely, 2^6409478 is an apocalyptic number.

6409478 is a deficient number, since it is larger than the sum of its proper divisors (3204742).

6409478 is a wasteful number, since it uses less digits than its factorization.

6409478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3204741.

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 6409478 is about 2531.6946893336. The cubic root of 6409478 is about 185.7551601776.

The spelling of 6409478 in words is "six million, four hundred nine thousand, four hundred seventy-eight".