144564424 has 8 divisors (see below), whose sum is σ = 271058310. Its totient is φ = 72282208.

The previous prime is 144564421. The next prime is 144564437. The reversal of 144564424 is 424465441.

It can be written as a sum of positive squares in only one way, i.e., 109872324 + 34692100 = 10482^2 + 5890^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 144564424.

It is not an unprimeable number, because it can be changed into a prime (144564421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9035269 + ... + 9035284.

Almost surely, 2^144564424 is an apocalyptic number.

It is an amenable number.

144564424 is a deficient number, since it is larger than the sum of its proper divisors (126493886).

144564424 is a wasteful number, since it uses less digits than its factorization.

144564424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18070559 (or 18070555 counting only the distinct ones).

The product of its digits is 61440, while the sum is 34.

The square root of 144564424 is about 12023.4946666932. The cubic root of 144564424 is about 524.8322051827.

The spelling of 144564424 in words is "one hundred forty-four million, five hundred sixty-four thousand, four hundred twenty-four".