6408005 has 8 divisors (see below), whose sum is σ = 7704312. Its totient is φ = 5116608.

The previous prime is 6407981. The next prime is 6408023. The reversal of 6408005 is 5008046.

It can be written as a sum of positive squares in 4 ways, for example, as 638401 + 5769604 = 799^2 + 2402^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 6408005 - 2⁶ = 6407941 is a prime.

It is a Duffinian number.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 2939 + ... + 4631.

It is an arithmetic number, because the mean of its divisors is an integer number (963039).

Almost surely, 2^6408005 is an apocalyptic number.

It is an amenable number.

6408005 is a deficient number, since it is larger than the sum of its proper divisors (1296307).

6408005 is a wasteful number, since it uses less digits than its factorization.

6408005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2455.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 6408005 is about 2531.4037607620. The cubic root of 6408005 is about 185.7409292571.

The spelling of 6408005 in words is "six million, four hundred eight thousand, five".