144391740 has 24 divisors (see below), whose sum is σ = 404297040. Its totient is φ = 38504448.

The previous prime is 144391729. The next prime is 144391747. The reversal of 144391740 is 47193441.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144391747) 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, 1203205 + ... + 1203324.

It is an arithmetic number, because the mean of its divisors is an integer number (16845710).

Almost surely, 2^144391740 is an apocalyptic number.

144391740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

144391740 is an abundant number, since it is smaller than the sum of its proper divisors (259905300).

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

144391740 is a wasteful number, since it uses less digits than its factorization.

144391740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2406541 (or 2406539 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 144391740 is about 12016.3114140738. The cubic root of 144391740 is about 524.6231490580.

The spelling of 144391740 in words is "one hundred forty-four million, three hundred ninety-one thousand, seven hundred forty".