144442439 has 4 divisors (see below), whose sum is σ = 145249560. Its totient is φ = 143635320.

The previous prime is 144442433. The next prime is 144442451. The reversal of 144442439 is 934244441.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-144442439 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 144442399 and 144442408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144442433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 403292 + ... + 403649.

It is an arithmetic number, because the mean of its divisors is an integer number (36312390).

Almost surely, 2^144442439 is an apocalyptic number.

144442439 is a deficient number, since it is larger than the sum of its proper divisors (807121).

144442439 is an equidigital number, since it uses as much as digits as its factorization.

144442439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 807120.

The product of its digits is 55296, while the sum is 35.

The square root of 144442439 is about 12018.4208197250. The cubic root of 144442439 is about 524.6845439748.

The spelling of 144442439 in words is "one hundred forty-four million, four hundred forty-two thousand, four hundred thirty-nine".