6449544 has 80 divisors (see below), whose sum is σ = 18621900. Its totient is φ = 2083968.

The previous prime is 6449537. The next prime is 6449617. The reversal of 6449544 is 4459446.

6449544 is a `hidden beast` number, since 644 + 9 + 5 + 4 + 4 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 6441444 + 8100 = 2538^2 + 90^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 6449499 and 6449508.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 23842 + ... + 24110.

Almost surely, 2^6449544 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6449544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9310950).

6449544 is an abundant number, since it is smaller than the sum of its proper divisors (12172356).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6449544 is a wasteful number, since it uses less digits than its factorization.

6449544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324 (or 311 counting only the distinct ones).

The product of its digits is 69120, while the sum is 36.

The square root of 6449544 is about 2539.5952433410. The cubic root of 6449544 is about 186.1414117113.

The spelling of 6449544 in words is "six million, four hundred forty-nine thousand, five hundred forty-four".