144132440 has 32 divisors (see below), whose sum is σ = 330421680. Its totient is φ = 56564352.

The previous prime is 144132433. The next prime is 144132449. The reversal of 144132440 is 44231441.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144132449) 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, 31874 + ... + 36113.

Almost surely, 2^144132440 is an apocalyptic number.

144132440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

144132440 is an abundant number, since it is smaller than the sum of its proper divisors (186289240).

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

144132440 is a wasteful number, since it uses less digits than its factorization.

144132440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68051 (or 68047 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 144132440 is about 12005.5170650830. The cubic root of 144132440 is about 524.3089198767.

Adding to 144132440 its reverse (44231441), we get a palindrome (188363881).

Subtracting from 144132440 its reverse (44231441), we obtain a palindrome (99900999).

The spelling of 144132440 in words is "one hundred forty-four million, one hundred thirty-two thousand, four hundred forty".