144391938 has 32 divisors (see below), whose sum is σ = 292533120. Its totient is φ = 47510400.

The previous prime is 144391927. The next prime is 144391967. The reversal of 144391938 is 839193441.

It is a self number, because there is not a number n which added to its sum of digits gives 144391938.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 178078 + ... + 178886.

It is an arithmetic number, because the mean of its divisors is an integer number (9141660).

Almost surely, 2^144391938 is an apocalyptic number.

144391938 is an abundant number, since it is smaller than the sum of its proper divisors (148141182).

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

144391938 is a wasteful number, since it uses less digits than its factorization.

144391938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1162.

The product of its digits is 93312, while the sum is 42.

The square root of 144391938 is about 12016.3196528721. The cubic root of 144391938 is about 524.6233888578.

The spelling of 144391938 in words is "one hundred forty-four million, three hundred ninety-one thousand, nine hundred thirty-eight".