144428 has 6 divisors (see below), whose sum is σ = 252756. Its totient is φ = 72212.

The previous prime is 144427. The next prime is 144439. The reversal of 144428 is 824441.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (144427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18050 + ... + 18057.

It is an arithmetic number, because the mean of its divisors is an integer number (42126).

2¹⁴⁴⁴²⁸ is an apocalyptic number.

It is an amenable number.

144428 is a deficient number, since it is larger than the sum of its proper divisors (108328).

144428 is a wasteful number, since it uses less digits than its factorization.

144428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36111 (or 36109 counting only the distinct ones).

The product of its digits is 1024, while the sum is 23.

The square root of 144428 is about 380.0368403195. The cubic root of 144428 is about 52.4667060257.

Adding to 144428 its reverse (824441), we get a palindrome (968869).

The spelling of 144428 in words is "one hundred forty-four thousand, four hundred twenty-eight".