2643408 has 80 divisors (see below), whose sum is σ = 7886400. Its totient is φ = 846720.

The previous prime is 2643397. The next prime is 2643427. The reversal of 2643408 is 8043462.

2643408 is nontrivially palindromic in base 15.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12423 + ... + 12633.

It is an arithmetic number, because the mean of its divisors is an integer number (98580).

2^2643408 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 2643408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3943200).

2643408 is an abundant number, since it is smaller than the sum of its proper divisors (5242992).

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

2643408 is a wasteful number, since it uses less digits than its factorization.

2643408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257 (or 245 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 2643408 is about 1625.8560821918. The cubic root of 2643408 is about 138.2679105489.

It can be divided in two parts, 26 and 43408, that added together give a palindrome (43434).

The spelling of 2643408 in words is "two million, six hundred forty-three thousand, four hundred eight".