1444484639 has 8 divisors (see below), whose sum is σ = 1556592912. Its totient is φ = 1332518400.

The previous prime is 1444484627. The next prime is 1444484651. The reversal of 1444484639 is 9364844441.

It is an interprime number because it is at equal distance from previous prime (1444484627) and next prime (1444484651).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1444484639 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1444484593 and 1444484602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1444484609) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13889 + ... + 55514.

It is an arithmetic number, because the mean of its divisors is an integer number (194574114).

Almost surely, 2^1444484639 is an apocalyptic number.

1444484639 is a deficient number, since it is larger than the sum of its proper divisors (112108273).

1444484639 is a wasteful number, since it uses less digits than its factorization.

1444484639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71017.

The product of its digits is 1327104, while the sum is 47.

The square root of 1444484639 is about 38006.3762939852. The cubic root of 1444484639 is about 1130.4142994898.

The spelling of 1444484639 in words is "one billion, four hundred forty-four million, four hundred eighty-four thousand, six hundred thirty-nine".