1144839638 has 16 divisors (see below), whose sum is σ = 1761960816. Its totient is φ = 557564160.

The previous prime is 1144839629. The next prime is 1144839649. The reversal of 1144839638 is 8369384411.

It is a junction number, because it is equal to n+sod(n) for n = 1144839592 and 1144839601.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41870 + ... + 63582.

It is an arithmetic number, because the mean of its divisors is an integer number (110122551).

Almost surely, 2^1144839638 is an apocalyptic number.

1144839638 is a deficient number, since it is larger than the sum of its proper divisors (617121178).

1144839638 is a wasteful number, since it uses less digits than its factorization.

1144839638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22399.

The product of its digits is 497664, while the sum is 47.

The square root of 1144839638 is about 33835.4789828665. The cubic root of 1144839638 is about 1046.1201142368.

The spelling of 1144839638 in words is "one billion, one hundred forty-four million, eight hundred thirty-nine thousand, six hundred thirty-eight".