2643456 has 40 divisors (see below), whose sum is σ = 7046424. Its totient is φ = 880640.

The previous prime is 2643439. The next prime is 2643457. The reversal of 2643456 is 6543462.

It is a d-powerful number, because it can be written as 2¹⁹ + 6³ + 4⁹ + 3¹³ + 4⁹ + 5³ + 6³ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2643457) 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, 676 + ... + 2396.

2^2643456 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 2643456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3523212).

2643456 is an abundant number, since it is smaller than the sum of its proper divisors (4402968).

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

2643456 is an equidigital number, since it uses as much as digits as its factorization.

2643456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1742 (or 1726 counting only the distinct ones).

The product of its digits is 17280, while the sum is 30.

The square root of 2643456 is about 1625.8708435789. The cubic root of 2643456 is about 138.2687474508.

The spelling of 2643456 in words is "two million, six hundred forty-three thousand, four hundred fifty-six".