2644420 has 24 divisors (see below), whose sum is σ = 5846400. Its totient is φ = 1001952.

The previous prime is 2644409. The next prime is 2644429. The reversal of 2644420 is 244462.

It is a junction number, because it is equal to n+sod(n) for n = 2644391 and 2644400.

It is not an unprimeable number, because it can be changed into a prime (2644429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3100 + ... + 3859.

It is an arithmetic number, because the mean of its divisors is an integer number (243600).

2^2644420 is an apocalyptic number.

2644420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2644420 is an abundant number, since it is smaller than the sum of its proper divisors (3201980).

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

2644420 is a wasteful number, since it uses less digits than its factorization.

2644420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6987 (or 6985 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 2644420 is about 1626.1672730688. The cubic root of 2644420 is about 138.2855530862.

Adding to 2644420 its reverse (244462), we get a palindrome (2888882).

The spelling of 2644420 in words is "two million, six hundred forty-four thousand, four hundred twenty".