6444641 has 16 divisors (see below), whose sum is σ = 7776000. Its totient is φ = 5224128.

The previous prime is 6444637. The next prime is 6444653. The reversal of 6444641 is 1464446.

It is not a de Polignac number, because 6444641 - 2² = 6444637 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6444601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10460 + ... + 11058.

It is an arithmetic number, because the mean of its divisors is an integer number (486000).

Almost surely, 2^6444641 is an apocalyptic number.

It is an amenable number.

6444641 is a deficient number, since it is larger than the sum of its proper divisors (1331359).

6444641 is a wasteful number, since it uses less digits than its factorization.

6444641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 688.

The product of its digits is 9216, while the sum is 29.

The square root of 6444641 is about 2538.6297485061. The cubic root of 6444641 is about 186.0942309748.

The spelling of 6444641 in words is "six million, four hundred forty-four thousand, six hundred forty-one".