144439566 has 8 divisors (see below), whose sum is σ = 288879144. Its totient is φ = 48146520.

The previous prime is 144439549. The next prime is 144439567. The reversal of 144439566 is 665934441.

It is a happy number.

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

144439566 is an admirable number.

It is a super-3 number, since 3×144439566³ (a number of 25 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144439567) 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, 12036625 + ... + 12036636.

It is an arithmetic number, because the mean of its divisors is an integer number (36109893).

Almost surely, 2^144439566 is an apocalyptic number.

144439566 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

144439566 is a wasteful number, since it uses less digits than its factorization.

144439566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24073266.

The product of its digits is 311040, while the sum is 42.

The square root of 144439566 is about 12018.3012942762. The cubic root of 144439566 is about 524.6810652450.

The spelling of 144439566 in words is "one hundred forty-four million, four hundred thirty-nine thousand, five hundred sixty-six".