144320240 has 40 divisors (see below), whose sum is σ = 347120640. Its totient is φ = 55736576.

The previous prime is 144320207. The next prime is 144320243. The reversal of 144320240 is 42023441.

It is a tau number, because it is divible by the number of its divisors (40).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144320243) 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, 28784 + ... + 33423.

It is an arithmetic number, because the mean of its divisors is an integer number (8678016).

Almost surely, 2^144320240 is an apocalyptic number.

144320240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

144320240 is an abundant number, since it is smaller than the sum of its proper divisors (202800400).

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

144320240 is a wasteful number, since it uses less digits than its factorization.

144320240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62249 (or 62243 counting only the distinct ones).

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

The square root of 144320240 is about 12013.3359230482. The cubic root of 144320240 is about 524.5365403449.

Adding to 144320240 its reverse (42023441), we get a palindrome (186343681).

The spelling of 144320240 in words is "one hundred forty-four million, three hundred twenty thousand, two hundred forty".