144169988 has 6 divisors (see below), whose sum is σ = 252297486. Its totient is φ = 72084992.

The previous prime is 144169969. The next prime is 144169999. The reversal of 144169988 is 889961441.

It can be written as a sum of positive squares in only one way, i.e., 132664324 + 11505664 = 11518^2 + 3392^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18021245 + ... + 18021252.

It is an arithmetic number, because the mean of its divisors is an integer number (42049581).

Almost surely, 2^144169988 is an apocalyptic number.

It is an amenable number.

144169988 is a deficient number, since it is larger than the sum of its proper divisors (108127498).

144169988 is a wasteful number, since it uses less digits than its factorization.

144169988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36042501 (or 36042499 counting only the distinct ones).

The product of its digits is 497664, while the sum is 50.

The square root of 144169988 is about 12007.0807442942. The cubic root of 144169988 is about 524.3544452330.

The spelling of 144169988 in words is "one hundred forty-four million, one hundred sixty-nine thousand, nine hundred eighty-eight".