6444872 has 48 divisors (see below), whose sum is σ = 14435820. Its totient is φ = 2688000.

The previous prime is 6444871. The next prime is 6444937. The reversal of 6444872 is 2784446.

It can be written as a sum of positive squares in 2 ways, for example, as 6421156 + 23716 = 2534^2 + 154^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6444871) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15872 + ... + 16272.

Almost surely, 2^6444872 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 6444872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7217910).

6444872 is an abundant number, since it is smaller than the sum of its proper divisors (7990948).

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

6444872 is a wasteful number, since it uses less digits than its factorization.

6444872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462 (or 451 counting only the distinct ones).

The product of its digits is 43008, while the sum is 35.

The square root of 6444872 is about 2538.6752450835. The cubic root of 6444872 is about 186.0964543857.

The spelling of 6444872 in words is "six million, four hundred forty-four thousand, eight hundred seventy-two".