144442320 has 80 divisors (see below), whose sum is σ = 488486592. Its totient is φ = 35015680.

The previous prime is 144442297. The next prime is 144442321. The reversal of 144442320 is 23244441.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144442321) 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, 24717 + ... + 29996.

Almost surely, 2^144442320 is an apocalyptic number.

144442320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

144442320 is an abundant number, since it is smaller than the sum of its proper divisors (344044272).

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

144442320 is a wasteful number, since it uses less digits than its factorization.

144442320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54740 (or 54734 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

The square root of 144442320 is about 12018.4158689904. The cubic root of 144442320 is about 524.6843998864.

Adding to 144442320 its reverse (23244441), we get a palindrome (167686761).

The spelling of 144442320 in words is "one hundred forty-four million, four hundred forty-two thousand, three hundred twenty".