2440644 has 12 divisors (see below), whose sum is σ = 5694864. Its totient is φ = 813544.

The previous prime is 2440643. The next prime is 2440649. The reversal of 2440644 is 4460442.

2440644 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (2440643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101682 + ... + 101705.

It is an arithmetic number, because the mean of its divisors is an integer number (474572).

2^2440644 is an apocalyptic number.

It is an amenable number.

2440644 is an abundant number, since it is smaller than the sum of its proper divisors (3254220).

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

2440644 is a wasteful number, since it uses less digits than its factorization.

2440644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203394 (or 203392 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

The square root of 2440644 is about 1562.2560609580. The cubic root of 2440644 is about 134.6381530761.

The spelling of 2440644 in words is "two million, four hundred forty thousand, six hundred forty-four".