144220240 has 20 divisors (see below), whose sum is σ = 335312244. Its totient is φ = 57688064.

The previous prime is 144220207. The next prime is 144220273. The reversal of 144220240 is 42022441.

It is an interprime number because it is at equal distance from previous prime (144220207) and next prime (144220273).

It can be written as a sum of positive squares in 2 ways, for example, as 41886784 + 102333456 = 6472^2 + 10116^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 901297 + ... + 901456.

Almost surely, 2^144220240 is an apocalyptic number.

144220240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

144220240 is an abundant number, since it is smaller than the sum of its proper divisors (191092004).

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

144220240 is a wasteful number, since it uses less digits than its factorization.

144220240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1802766 (or 1802760 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 144220240 is about 12009.1731605469. The cubic root of 144220240 is about 524.4153612832.

Adding to 144220240 its reverse (42022441), we get a palindrome (186242681).

The spelling of 144220240 in words is "one hundred forty-four million, two hundred twenty thousand, two hundred forty".