144220645 has 8 divisors (see below), whose sum is σ = 173145600. Its totient is φ = 115322640.

The previous prime is 144220613. The next prime is 144220679. The reversal of 144220645 is 546022441.

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

It is not a de Polignac number, because 144220645 - 2⁵ = 144220613 is a prime.

It is a congruent number.

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, 7956 + ... + 18754.

It is an arithmetic number, because the mean of its divisors is an integer number (21643200).

Almost surely, 2^144220645 is an apocalyptic number.

It is an amenable number.

144220645 is a deficient number, since it is larger than the sum of its proper divisors (28924955).

144220645 is a wasteful number, since it uses less digits than its factorization.

144220645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13475.

The product of its (nonzero) digits is 7680, while the sum is 28.

The square root of 144220645 is about 12009.1900226452. The cubic root of 144220645 is about 524.4158521713.

The spelling of 144220645 in words is "one hundred forty-four million, two hundred twenty thousand, six hundred forty-five".