144222320 has 120 divisors (see below), whose sum is σ = 377600832. Its totient is φ = 51166720.

The previous prime is 144222319. The next prime is 144222329. The reversal of 144222320 is 23222441.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 144222292 and 144222301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144222329) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 454802 + ... + 455118.

Almost surely, 2^144222320 is an apocalyptic number.

144222320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 144222320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (188800416).

144222320 is an abundant number, since it is smaller than the sum of its proper divisors (233378512).

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

144222320 is a wasteful number, since it uses less digits than its factorization.

144222320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399 (or 382 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 144222320 is about 12009.2597607013. The cubic root of 144222320 is about 524.4178823780.

Adding to 144222320 its reverse (23222441), we get a palindrome (167444761).

The spelling of 144222320 in words is "one hundred forty-four million, two hundred twenty-two thousand, three hundred twenty".