42239886 has 16 divisors (see below), whose sum is σ = 90978384. Its totient is φ = 12996864.

The previous prime is 42239867. The next prime is 42239893. The reversal of 42239886 is 68893224.

It is a congruent number.

It is an unprimeable number.

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, 270691 + ... + 270846.

It is an arithmetic number, because the mean of its divisors is an integer number (5686149).

Almost surely, 2^42239886 is an apocalyptic number.

42239886 is an abundant number, since it is smaller than the sum of its proper divisors (48738498).

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

42239886 is a wasteful number, since it uses less digits than its factorization.

42239886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 541555.

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

The square root of 42239886 is about 6499.2219534341. The cubic root of 42239886 is about 348.2631943414.

The spelling of 42239886 in words is "forty-two million, two hundred thirty-nine thousand, eight hundred eighty-six".