42018844 has 24 divisors (see below), whose sum is σ = 84183680. Its totient is φ = 17976816.

The previous prime is 42018817. The next prime is 42018863. The reversal of 42018844 is 44881024.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23179 + ... + 24925.

Almost surely, 2^42018844 is an apocalyptic number.

It is an amenable number.

42018844 is an abundant number, since it is smaller than the sum of its proper divisors (42164836).

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

42018844 is a wasteful number, since it uses less digits than its factorization.

42018844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2617 (or 2615 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 31.

The square root of 42018844 is about 6482.1943815347. The cubic root of 42018844 is about 347.6546426254.

Adding to 42018844 its reverse (44881024), we get a palindrome (86899868).

The spelling of 42018844 in words is "forty-two million, eighteen thousand, eight hundred forty-four".