144436 has 6 divisors (see below), whose sum is σ = 252770. Its totient is φ = 72216.

The previous prime is 144427. The next prime is 144439. The reversal of 144436 is 634441.

It is a happy number.

144436 is an esthetic number in base 16, because in such base its adjacent digits differ by 1.

It can be written as a sum of positive squares in only one way, i.e., 144400 + 36 = 380^2 + 6^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144439) by changing a digit.

144436 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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, 18051 + ... + 18058.

2¹⁴⁴⁴³⁶ is an apocalyptic number.

It is an amenable number.

144436 is a deficient number, since it is larger than the sum of its proper divisors (108334).

144436 is a wasteful number, since it uses less digits than its factorization.

144436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36113 (or 36111 counting only the distinct ones).

The product of its digits is 1152, while the sum is 22.

The square root of 144436 is about 380.0473654691. The cubic root of 144436 is about 52.4676747342.

Adding to 144436 its reverse (634441), we get a palindrome (778877).

It can be divided in two parts, 1444 and 36, that multiplied together give a square (51984 = 228²).

The spelling of 144436 in words is "one hundred forty-four thousand, four hundred thirty-six".