144622399 has 8 divisors (see below), whose sum is σ = 148348640. Its totient is φ = 140940000.

The previous prime is 144622369. The next prime is 144622421. The reversal of 144622399 is 993226441.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 144622399 - 2¹⁹ = 144098111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144622369) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4227 + ... + 17524.

It is an arithmetic number, because the mean of its divisors is an integer number (18543580).

Almost surely, 2^144622399 is an apocalyptic number.

144622399 is a deficient number, since it is larger than the sum of its proper divisors (3726241).

144622399 is a wasteful number, since it uses less digits than its factorization.

144622399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21921.

The product of its digits is 93312, while the sum is 40.

The square root of 144622399 is about 12025.9053297454. The cubic root of 144622399 is about 524.9023540242.

It can be divided in two parts, 14462 and 2399, that added together give a palindrome (16861).

The spelling of 144622399 in words is "one hundred forty-four million, six hundred twenty-two thousand, three hundred ninety-nine".