2644431 has 4 divisors (see below), whose sum is σ = 3525912. Its totient is φ = 1762952.

The previous prime is 2644429. The next prime is 2644451. The reversal of 2644431 is 1344462.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2644431 - 2¹ = 2644429 is a prime.

It is a super-2 number, since 2×2644431² = 13986030627522, which contains 22 as substring.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2644451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 440736 + ... + 440741.

It is an arithmetic number, because the mean of its divisors is an integer number (881478).

2^2644431 is an apocalyptic number.

2644431 is a deficient number, since it is larger than the sum of its proper divisors (881481).

2644431 is an equidigital number, since it uses as much as digits as its factorization.

2644431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 881480.

The product of its digits is 2304, while the sum is 24.

The square root of 2644431 is about 1626.1706552512. The cubic root of 2644431 is about 138.2857448282.

Adding to 2644431 its reverse (1344462), we get a palindrome (3988893).

The spelling of 2644431 in words is "two million, six hundred forty-four thousand, four hundred thirty-one".