6404434 has 4 divisors (see below), whose sum is σ = 9606654. Its totient is φ = 3202216.

The previous prime is 6404407. The next prime is 6404449. The reversal of 6404434 is 4344046.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 5978025 + 426409 = 2445^2 + 653^2 .

It is a junction number, because it is equal to n+sod(n) for n = 6404399 and 6404408.

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 as a sum of consecutive naturals, namely, 1601107 + ... + 1601110.

Almost surely, 2^6404434 is an apocalyptic number.

6404434 is a deficient number, since it is larger than the sum of its proper divisors (3202220).

6404434 is a wasteful number, since it uses less digits than its factorization.

6404434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3202219.

The product of its (nonzero) digits is 4608, while the sum is 25.

The square root of 6404434 is about 2530.6983225979. The cubic root of 6404434 is about 185.7064201233.

The spelling of 6404434 in words is "six million, four hundred four thousand, four hundred thirty-four".