144447940 has 48 divisors (see below), whose sum is σ = 373347072. Its totient is φ = 45714816.

The previous prime is 144447917. The next prime is 144447943. The reversal of 144447940 is 49744441.

It is a self number, because there is not a number n which added to its sum of digits gives 144447940.

It is not an unprimeable number, because it can be changed into a prime (144447943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37864 + ... + 41503.

It is an arithmetic number, because the mean of its divisors is an integer number (7778064).

Almost surely, 2^144447940 is an apocalyptic number.

144447940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

144447940 is an abundant number, since it is smaller than the sum of its proper divisors (228899132).

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

144447940 is a wasteful number, since it uses less digits than its factorization.

144447940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79396 (or 79394 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 37.

The square root of 144447940 is about 12018.6496745683. The cubic root of 144447940 is about 524.6912046512.

The spelling of 144447940 in words is "one hundred forty-four million, four hundred forty-seven thousand, nine hundred forty".