144220418 has 16 divisors (see below), whose sum is σ = 229795704. Its totient is φ = 67649280.

The previous prime is 144220403. The next prime is 144220429. The reversal of 144220418 is 814022441.

It can be written as a sum of positive squares in 4 ways, for example, as 79691329 + 64529089 = 8927^2 + 8033^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4088 + ... + 17468.

Almost surely, 2^144220418 is an apocalyptic number.

144220418 is a deficient number, since it is larger than the sum of its proper divisors (85575286).

144220418 is a wasteful number, since it uses less digits than its factorization.

144220418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13717.

The product of its (nonzero) digits is 2048, while the sum is 26.

The square root of 144220418 is about 12009.1805715461. The cubic root of 144220418 is about 524.4155770316.

Adding to 144220418 its reverse (814022441), we get a palindrome (958242859).

The spelling of 144220418 in words is "one hundred forty-four million, two hundred twenty thousand, four hundred eighteen".