144440442 has 32 divisors (see below), whose sum is σ = 323832960. Its totient is φ = 47718720.

The previous prime is 144440441. The next prime is 144440453. The reversal of 144440442 is 244044441.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (144440441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5734 + ... + 17937.

It is an arithmetic number, because the mean of its divisors is an integer number (10119780).

Almost surely, 2^144440442 is an apocalyptic number.

144440442 is an abundant number, since it is smaller than the sum of its proper divisors (179392518).

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

144440442 is a wasteful number, since it uses less digits than its factorization.

144440442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23795 (or 23789 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 27.

The square root of 144440442 is about 12018.3377386392. The cubic root of 144440442 is about 524.6821259416.

Adding to 144440442 its reverse (244044441), we get a palindrome (388484883).

The spelling of 144440442 in words is "one hundred forty-four million, four hundred forty thousand, four hundred forty-two".