2605404424 has 64 divisors (see below), whose sum is σ = 5773455360. Its totient is φ = 1078643520.

The previous prime is 2605404413. The next prime is 2605404523. The reversal of 2605404424 is 4244045062.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1365279 + ... + 1367185.

It is an arithmetic number, because the mean of its divisors is an integer number (90210240).

Almost surely, 2^2605404424 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 2605404424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2886727680).

2605404424 is an abundant number, since it is smaller than the sum of its proper divisors (3168050936).

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

2605404424 is a wasteful number, since it uses less digits than its factorization.

2605404424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2738 (or 2734 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 31.

The square root of 2605404424 is about 51043.1623628474. The cubic root of 2605404424 is about 1376.0209583634.

Adding to 2605404424 its reverse (4244045062), we get a palindrome (6849449486).

The spelling of 2605404424 in words is "two billion, six hundred five million, four hundred four thousand, four hundred twenty-four".