42442388 has 12 divisors (see below), whose sum is σ = 74392500. Its totient is φ = 21187392.

The previous prime is 42442381. The next prime is 42442391. The reversal of 42442388 is 88324424.

It is a happy number.

42442388 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 17322244 + 25120144 = 4162^2 + 5012^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42442381) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 5513 + ... + 10736.

It is an arithmetic number, because the mean of its divisors is an integer number (6199375).

Almost surely, 2^42442388 is an apocalyptic number.

It is an amenable number.

42442388 is a deficient number, since it is larger than the sum of its proper divisors (31950112).

42442388 is a wasteful number, since it uses less digits than its factorization.

42442388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16906 (or 16904 counting only the distinct ones).

The product of its digits is 49152, while the sum is 35.

The square root of 42442388 is about 6514.7822680424. The cubic root of 42442388 is about 348.8188428820.

The spelling of 42442388 in words is "forty-two million, four hundred forty-two thousand, three hundred eighty-eight".