6404426 has 8 divisors (see below), whose sum is σ = 10979040. Its totient is φ = 2744748.

The previous prime is 6404407. The next prime is 6404449. The reversal of 6404426 is 6244046.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 6404395 and 6404404.

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 3 ways as a sum of consecutive naturals, for example, 228716 + ... + 228743.

It is an arithmetic number, because the mean of its divisors is an integer number (1372380).

Almost surely, 2^6404426 is an apocalyptic number.

6404426 is a deficient number, since it is larger than the sum of its proper divisors (4574614).

6404426 is a wasteful number, since it uses less digits than its factorization.

6404426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 457468.

The product of its (nonzero) digits is 4608, while the sum is 26.

The square root of 6404426 is about 2530.6967420060. The cubic root of 6404426 is about 185.7063427992.

The spelling of 6404426 in words is "six million, four hundred four thousand, four hundred twenty-six".