144447819 has 16 divisors (see below), whose sum is σ = 194503680. Its totient is φ = 95350400.

The previous prime is 144447803. The next prime is 144447847. The reversal of 144447819 is 918744441.

It is a cyclic number.

It is not a de Polignac number, because 144447819 - 2⁴ = 144447803 is a prime.

It is a super-2 number, since 2×144447819² = 41730344827713522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (144447859) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 200542 + ... + 201260.

It is an arithmetic number, because the mean of its divisors is an integer number (12156480).

Almost surely, 2^144447819 is an apocalyptic number.

144447819 is a deficient number, since it is larger than the sum of its proper divisors (50055861).

144447819 is a wasteful number, since it uses less digits than its factorization.

144447819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1290.

The product of its digits is 129024, while the sum is 42.

The square root of 144447819 is about 12018.6446407238. The cubic root of 144447819 is about 524.6910581448.

The spelling of 144447819 in words is "one hundred forty-four million, four hundred forty-seven thousand, eight hundred nineteen".