42955438 has 16 divisors (see below), whose sum is σ = 66916080. Its totient is φ = 20655936.

The previous prime is 42955403. The next prime is 42955441. The reversal of 42955438 is 83455924.

It is a self number, because there is not a number n which added to its sum of digits gives 42955438.

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, 15106 + ... + 17722.

It is an arithmetic number, because the mean of its divisors is an integer number (4182255).

Almost surely, 2^42955438 is an apocalyptic number.

42955438 is a deficient number, since it is larger than the sum of its proper divisors (23960642).

42955438 is a wasteful number, since it uses less digits than its factorization.

42955438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2931.

The product of its digits is 172800, while the sum is 40.

The square root of 42955438 is about 6554.0398228879. The cubic root of 42955438 is about 350.2187421741.

The spelling of 42955438 in words is "forty-two million, nine hundred fifty-five thousand, four hundred thirty-eight".