42667638 has 16 divisors (see below), whose sum is σ = 91899696. Its totient is φ = 13128480.

The previous prime is 42667621. The next prime is 42667649. The reversal of 42667638 is 83676624.

42667638 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 42667638.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 273433 + ... + 273588.

It is an arithmetic number, because the mean of its divisors is an integer number (5743731).

Almost surely, 2^42667638 is an apocalyptic number.

42667638 is an abundant number, since it is smaller than the sum of its proper divisors (49232058).

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

42667638 is a wasteful number, since it uses less digits than its factorization.

42667638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 547039.

The product of its digits is 290304, while the sum is 42.

The square root of 42667638 is about 6532.0469992185. The cubic root of 42667638 is about 349.4348375551.

The spelling of 42667638 in words is "forty-two million, six hundred sixty-seven thousand, six hundred thirty-eight".