6404455 has 8 divisors (see below), whose sum is σ = 7849152. Its totient is φ = 5014368.

The previous prime is 6404449. The next prime is 6404473. The reversal of 6404455 is 5544046.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6404455 is a prime.

It is a Duffinian number.

6404455 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13392 + ... + 13861.

It is an arithmetic number, because the mean of its divisors is an integer number (981144).

Almost surely, 2^6404455 is an apocalyptic number.

6404455 is a deficient number, since it is larger than the sum of its proper divisors (1444697).

6404455 is a wasteful number, since it uses less digits than its factorization.

6404455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27305.

The product of its (nonzero) digits is 9600, while the sum is 28.

The square root of 6404455 is about 2530.7024716470. The cubic root of 6404455 is about 185.7066230989.

It can be divided in two parts, 6404 and 455, that added together give a cube (6859 = 19³).

The spelling of 6404455 in words is "six million, four hundred four thousand, four hundred fifty-five".