6444431 has 6 divisors (see below), whose sum is σ = 7496640. Its totient is φ = 5523756.

The previous prime is 6444413. The next prime is 6444437. The reversal of 6444431 is 1344446.

6444431 is digitally balanced in base 8, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6444431 - 2¹⁰ = 6443407 is a prime.

It is a super-2 number, since 2×6444431² = 83061381827522, which contains 22 as substring.

It is a Duffinian number.

6444431 is strictly pandigital in base 8.

It is a nialpdrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 6444431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6444437) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 65711 + ... + 65808.

It is an arithmetic number, because the mean of its divisors is an integer number (1249440).

Almost surely, 2^6444431 is an apocalyptic number.

6444431 is a deficient number, since it is larger than the sum of its proper divisors (1052209).

6444431 is a wasteful number, since it uses less digits than its factorization.

6444431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131533 (or 131526 counting only the distinct ones).

The product of its digits is 4608, while the sum is 26.

The square root of 6444431 is about 2538.5883872735. The cubic root of 6444431 is about 186.0922096462.

Adding to 6444431 its reverse (1344446), we get a palindrome (7788877).

The spelling of 6444431 in words is "six million, four hundred forty-four thousand, four hundred thirty-one".