144401240 has 32 divisors (see below), whose sum is σ = 325594080. Its totient is φ = 57637632.

The previous prime is 144401189. The next prime is 144401263. The reversal of 144401240 is 42104441.

It is a happy number.

It is a super-2 number, since 2×144401240² = 41703436227075200, which contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16532 + ... + 23708.

It is an arithmetic number, because the mean of its divisors is an integer number (10174815).

Almost surely, 2^144401240 is an apocalyptic number.

144401240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

144401240 is an abundant number, since it is smaller than the sum of its proper divisors (181192840).

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

144401240 is a wasteful number, since it uses less digits than its factorization.

144401240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7691 (or 7687 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 144401240 is about 12016.7067035856. The cubic root of 144401240 is about 524.6346543574.

Adding to 144401240 its reverse (42104441), we get a palindrome (186505681).

The spelling of 144401240 in words is "one hundred forty-four million, four hundred one thousand, two hundred forty".