144403140 has 48 divisors (see below), whose sum is σ = 462091392. Its totient is φ = 33006336.

The previous prime is 144403139. The next prime is 144403141. The reversal of 144403140 is 41304441.

It is an interprime number because it is at equal distance from previous prime (144403139) and next prime (144403141).

It is a super-4 number, since 4×144403140⁴ (a number of 34 digits) contains 4444 as substring. Note that it is a super-d number also for d = 3.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (144403141) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 171489 + ... + 172328.

It is an arithmetic number, because the mean of its divisors is an integer number (9626904).

Almost surely, 2^144403140 is an apocalyptic number.

144403140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

144403140 is an abundant number, since it is smaller than the sum of its proper divisors (317688252).

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

144403140 is a wasteful number, since it uses less digits than its factorization.

144403140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343836 (or 343834 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 144403140 is about 12016.7857599277. The cubic root of 144403140 is about 524.6369553568.

Adding to 144403140 its reverse (41304441), we get a palindrome (185707581).

The spelling of 144403140 in words is "one hundred forty-four million, four hundred three thousand, one hundred forty".