42442144 has 24 divisors (see below), whose sum is σ = 83831328. Its totient is φ = 21151680.

The previous prime is 42442129. The next prime is 42442157. The reversal of 42442144 is 44124424.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8589 + ... + 12595.

It is an arithmetic number, because the mean of its divisors is an integer number (3492972).

Almost surely, 2^42442144 is an apocalyptic number.

It is an amenable number.

42442144 is a deficient number, since it is larger than the sum of its proper divisors (41389184).

42442144 is a wasteful number, since it uses less digits than its factorization.

42442144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4348 (or 4340 counting only the distinct ones).

The product of its digits is 4096, while the sum is 25.

The square root of 42442144 is about 6514.7635413728. The cubic root of 42442144 is about 348.8181744310.

Adding to 42442144 its reverse (44124424), we get a palindrome (86566568).

The spelling of 42442144 in words is "forty-two million, four hundred forty-two thousand, one hundred forty-four".