6408645 has 8 divisors (see below), whose sum is σ = 10253856. Its totient is φ = 3417936.

The previous prime is 6408637. The next prime is 6408653. The reversal of 6408645 is 5468046.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (6408637) and next prime (6408653).

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

It is not a de Polignac number, because 6408645 - 2³ = 6408637 is a prime.

It is a super-3 number, since 3×6408645³ (a number of 21 digits) contains 333 as substring.

6408645 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 (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 213607 + ... + 213636.

It is an arithmetic number, because the mean of its divisors is an integer number (1281732).

Almost surely, 2^6408645 is an apocalyptic number.

It is an amenable number.

6408645 is a deficient number, since it is larger than the sum of its proper divisors (3845211).

6408645 is a wasteful number, since it uses less digits than its factorization.

6408645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427251.

The product of its (nonzero) digits is 23040, while the sum is 33.

The square root of 6408645 is about 2531.5301696800. The cubic root of 6408645 is about 185.7471126812.

The spelling of 6408645 in words is "six million, four hundred eight thousand, six hundred forty-five".