144638 has 8 divisors (see below), whose sum is σ = 233688. Its totient is φ = 66744.

The previous prime is 144629. The next prime is 144659. The reversal of 144638 is 836441.

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

It is a Harshad number since it is a multiple of its sum of digits (26), and also a Moran number because the ratio is a prime number: 5563 = 144638 / (1 + 4 + 4 + 6 + 3 + 8).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2756 + ... + 2807.

It is an arithmetic number, because the mean of its divisors is an integer number (29211).

2¹⁴⁴⁶³⁸ is an apocalyptic number.

144638 is a deficient number, since it is larger than the sum of its proper divisors (89050).

144638 is a wasteful number, since it uses less digits than its factorization.

144638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5578.

The product of its digits is 2304, while the sum is 26.

The square root of 144638 is about 380.3130289643. The cubic root of 144638 is about 52.4921227788.

The spelling of 144638 in words is "one hundred forty-four thousand, six hundred thirty-eight".