2538387444 has 24 divisors (see below), whose sum is σ = 6023293920. Its totient is φ = 831787744.

The previous prime is 2538387443. The next prime is 2538387451. The reversal of 2538387444 is 4447838352.

It is a junction number, because it is equal to n+sod(n) for n = 2538387393 and 2538387402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2538387443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1791939 + ... + 1793354.

It is an arithmetic number, because the mean of its divisors is an integer number (250970580).

Almost surely, 2^2538387444 is an apocalyptic number.

It is an amenable number.

2538387444 is an abundant number, since it is smaller than the sum of its proper divisors (3484906476).

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

2538387444 is a wasteful number, since it uses less digits than its factorization.

2538387444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3585359 (or 3585357 counting only the distinct ones).

The product of its digits is 2580480, while the sum is 48.

The square root of 2538387444 is about 50382.4120502383. The cubic root of 2538387444 is about 1364.1201903303.

The spelling of 2538387444 in words is "two billion, five hundred thirty-eight million, three hundred eighty-seven thousand, four hundred forty-four".