2444240 has 20 divisors (see below), whose sum is σ = 5683044. Its totient is φ = 977664.

The previous prime is 2444219. The next prime is 2444251. The reversal of 2444240 is 424442.

It can be written as a sum of positive squares in 2 ways, for example, as 659344 + 1784896 = 812^2 + 1336^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15197 + ... + 15356.

2^2444240 is an apocalyptic number.

2444240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2444240 is an abundant number, since it is smaller than the sum of its proper divisors (3238804).

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

2444240 is a wasteful number, since it uses less digits than its factorization.

2444240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30566 (or 30560 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 20.

The square root of 2444240 is about 1563.4065370210. The cubic root of 2444240 is about 134.7042450869.

Adding to 2444240 its reverse (424442), we get a palindrome (2868682).

The spelling of 2444240 in words is "two million, four hundred forty-four thousand, two hundred forty".