42289638 has 16 divisors (see below), whose sum is σ = 85189440. Its totient is φ = 13994856.

The previous prime is 42289633. The next prime is 42289651. The reversal of 42289638 is 83698224.

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 42289638.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42289633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24520 + ... + 26187.

It is an arithmetic number, because the mean of its divisors is an integer number (5324340).

Almost surely, 2^42289638 is an apocalyptic number.

42289638 is an abundant number, since it is smaller than the sum of its proper divisors (42899802).

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

42289638 is a wasteful number, since it uses less digits than its factorization.

42289638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50851.

The product of its digits is 165888, while the sum is 42.

The square root of 42289638 is about 6503.0483621145. The cubic root of 42289638 is about 348.3998739412.

The spelling of 42289638 in words is "forty-two million, two hundred eighty-nine thousand, six hundred thirty-eight".