42635918 has 16 divisors (see below), whose sum is σ = 68992560. Its totient is φ = 19644096.

The previous prime is 42635911. The next prime is 42635947. The reversal of 42635918 is 81953624.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42635911) 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 7 ways as a sum of consecutive naturals, for example, 20021 + ... + 22047.

It is an arithmetic number, because the mean of its divisors is an integer number (4312035).

Almost surely, 2^42635918 is an apocalyptic number.

42635918 is a deficient number, since it is larger than the sum of its proper divisors (26356642).

42635918 is a wasteful number, since it uses less digits than its factorization.

42635918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2851.

The product of its digits is 51840, while the sum is 38.

The square root of 42635918 is about 6529.6185187191. The cubic root of 42635918 is about 349.3482237387.

The spelling of 42635918 in words is "forty-two million, six hundred thirty-five thousand, nine hundred eighteen".