2644393 has 4 divisors (see below), whose sum is σ = 2729728. Its totient is φ = 2559060.

The previous prime is 2644387. The next prime is 2644399. The reversal of 2644393 is 3934462.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (2644387) and next prime (2644399).

It is a cyclic number.

It is not a de Polignac number, because 2644393 - 2²¹ = 547241 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 85303 = 2644393 / (2 + 6 + 4 + 4 + 3 + 9 + 3).

It is a d-powerful number, because it can be written as 2 + 6³ + 4⁵ + 4¹⁰ + 3⁵ + 9 + 3¹³ .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2644399) 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, 42621 + ... + 42682.

It is an arithmetic number, because the mean of its divisors is an integer number (682432).

2^2644393 is an apocalyptic number.

It is an amenable number.

2644393 is a deficient number, since it is larger than the sum of its proper divisors (85335).

2644393 is an equidigital number, since it uses as much as digits as its factorization.

2644393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85334.

The product of its digits is 15552, while the sum is 31.

The square root of 2644393 is about 1626.1589713186. The cubic root of 2644393 is about 138.2850824446.

The spelling of 2644393 in words is "two million, six hundred forty-four thousand, three hundred ninety-three".