42436386 has 80 divisors (see below), whose sum is σ = 106112160. Its totient is φ = 12597120.

The previous prime is 42436343. The next prime is 42436397. The reversal of 42436386 is 68363424.

It is a happy number.

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 42436386.

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 39 ways as a sum of consecutive naturals, for example, 51921 + ... + 52731.

It is an arithmetic number, because the mean of its divisors is an integer number (1326402).

Almost surely, 2^42436386 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42436386, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53056080).

42436386 is an abundant number, since it is smaller than the sum of its proper divisors (63675774).

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

42436386 is a wasteful number, since it uses less digits than its factorization.

42436386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 861 (or 852 counting only the distinct ones).

The product of its digits is 82944, while the sum is 36.

The square root of 42436386 is about 6514.3216070440. The cubic root of 42436386 is about 348.8023993414.

The spelling of 42436386 in words is "forty-two million, four hundred thirty-six thousand, three hundred eighty-six".