2444387440 has 80 divisors (see below), whose sum is σ = 6232743936. Its totient is φ = 884153600.

The previous prime is 2444387437. The next prime is 2444387441. The reversal of 2444387440 is 447834442.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 2444387393 and 2444387402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2444387441) by changing a digit.

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, 160809 + ... + 175351.

Almost surely, 2^2444387440 is an apocalyptic number.

2444387440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2444387440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3116371968).

2444387440 is an abundant number, since it is smaller than the sum of its proper divisors (3788356496).

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

2444387440 is a wasteful number, since it uses less digits than its factorization.

2444387440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14758 (or 14752 counting only the distinct ones).

The product of its (nonzero) digits is 344064, while the sum is 40.

The square root of 2444387440 is about 49440.7467581144. The cubic root of 2444387440 is about 1347.0695354907.

The spelling of 2444387440 in words is "two billion, four hundred forty-four million, three hundred eighty-seven thousand, four hundred forty".