144721988 has 12 divisors (see below), whose sum is σ = 255197712. Its totient is φ = 71808360.

The previous prime is 144721987. The next prime is 144722021. The reversal of 144721988 is 889127441.

It is not an unprimeable number, because it can be changed into a prime (144721987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137570 + ... + 138617.

It is an arithmetic number, because the mean of its divisors is an integer number (21266476).

Almost surely, 2^144721988 is an apocalyptic number.

It is an amenable number.

144721988 is a deficient number, since it is larger than the sum of its proper divisors (110475724).

144721988 is a wasteful number, since it uses less digits than its factorization.

144721988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276322 (or 276320 counting only the distinct ones).

The product of its digits is 129024, while the sum is 44.

The square root of 144721988 is about 12030.0452201976. The cubic root of 144721988 is about 525.0228114049.

The spelling of 144721988 in words is "one hundred forty-four million, seven hundred twenty-one thousand, nine hundred eighty-eight".