6449645 has 8 divisors (see below), whose sum is σ = 8147040. Its totient is φ = 4888080.

The previous prime is 6449617. The next prime is 6449659. The reversal of 6449645 is 5469446.

It is a happy number.

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

It is not a de Polignac number, because 6449645 - 2¹⁰ = 6448621 is a prime.

It is a super-3 number, since 3×6449645³ (a number of 21 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6449599 and 6449608.

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, 33851 + ... + 34040.

It is an arithmetic number, because the mean of its divisors is an integer number (1018380).

Almost surely, 2^6449645 is an apocalyptic number.

It is an amenable number.

6449645 is a deficient number, since it is larger than the sum of its proper divisors (1697395).

6449645 is a wasteful number, since it uses less digits than its factorization.

6449645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67915.

The product of its digits is 103680, while the sum is 38.

The square root of 6449645 is about 2539.6151283216. The cubic root of 6449645 is about 186.1423833658.

The spelling of 6449645 in words is "six million, four hundred forty-nine thousand, six hundred forty-five".