42543844 has 12 divisors (see below), whose sum is σ = 85087744. Its totient is φ = 18233064.

The previous prime is 42543829. The next prime is 42543847. The reversal of 42543844 is 44834524.

42543844 is an admirable number.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (42543847) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 759684 + ... + 759739.

Almost surely, 2^42543844 is an apocalyptic number.

It is an amenable number.

42543844 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

42543844 is a wasteful number, since it uses less digits than its factorization.

42543844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1519434 (or 1519432 counting only the distinct ones).

The product of its digits is 61440, while the sum is 34.

The square root of 42543844 is about 6522.5642196915. The cubic root of 42543844 is about 349.0965652608.

The spelling of 42543844 in words is "forty-two million, five hundred forty-three thousand, eight hundred forty-four".