42044540 has 24 divisors (see below), whose sum is σ = 90348720. Its totient is φ = 16426368.

The previous prime is 42044531. The next prime is 42044551. The reversal of 42044540 is 4544024.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23585 + ... + 25304.

It is an arithmetic number, because the mean of its divisors is an integer number (3764530).

Almost surely, 2^42044540 is an apocalyptic number.

It is an amenable number.

42044540 is an abundant number, since it is smaller than the sum of its proper divisors (48304180).

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

42044540 is a wasteful number, since it uses less digits than its factorization.

42044540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48941 (or 48939 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 23.

The square root of 42044540 is about 6484.1761234562. The cubic root of 42044540 is about 347.7254958621.

Adding to 42044540 its reverse (4544024), we get a palindrome (46588564).

The spelling of 42044540 in words is "forty-two million, forty-four thousand, five hundred forty".