144431446 has 4 divisors (see below), whose sum is σ = 216647172. Its totient is φ = 72215722.

The previous prime is 144431437. The next prime is 144431477. The reversal of 144431446 is 644134441.

144431446 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36107860 + ... + 36107863.

It is an arithmetic number, because the mean of its divisors is an integer number (54161793).

Almost surely, 2^144431446 is an apocalyptic number.

144431446 is a deficient number, since it is larger than the sum of its proper divisors (72215726).

144431446 is an equidigital number, since it uses as much as digits as its factorization.

144431446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72215725.

The product of its digits is 18432, while the sum is 31.

The square root of 144431446 is about 12017.9634714040. The cubic root of 144431446 is about 524.6712330127.

Adding to 144431446 its reverse (644134441), we get a palindrome (788565887).

The spelling of 144431446 in words is "one hundred forty-four million, four hundred thirty-one thousand, four hundred forty-six".