6404458 has 4 divisors (see below), whose sum is σ = 9606690. Its totient is φ = 3202228.

The previous prime is 6404449. The next prime is 6404473. The reversal of 6404458 is 8544046.

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., 6335289 + 69169 = 2517^2 + 263^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1601113 + ... + 1601116.

Almost surely, 2^6404458 is an apocalyptic number.

6404458 is a deficient number, since it is larger than the sum of its proper divisors (3202232).

6404458 is a wasteful number, since it uses less digits than its factorization.

6404458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3202231.

The product of its (nonzero) digits is 15360, while the sum is 31.

The square root of 6404458 is about 2530.7030643677. The cubic root of 6404458 is about 185.7066520954.

The spelling of 6404458 in words is "six million, four hundred four thousand, four hundred fifty-eight".