42440144 has 20 divisors (see below), whose sum is σ = 82331040. Its totient is φ = 21193440.

The previous prime is 42440113. The next prime is 42440149. The reversal of 42440144 is 44104424.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42440149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20099 + ... + 22109.

It is an arithmetic number, because the mean of its divisors is an integer number (4116552).

Almost surely, 2^42440144 is an apocalyptic number.

It is an amenable number.

42440144 is a deficient number, since it is larger than the sum of its proper divisors (39890896).

42440144 is a wasteful number, since it uses less digits than its factorization.

42440144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3338 (or 3332 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 23.

The square root of 42440144 is about 6514.6100420516. The cubic root of 42440144 is about 348.8126952285.

Adding to 42440144 its reverse (44104424), we get a palindrome (86544568).

The spelling of 42440144 in words is "forty-two million, four hundred forty thousand, one hundred forty-four".