40423986 has 24 divisors (see below), whose sum is σ = 87919104. Its totient is φ = 13423320.

The previous prime is 40423967. The next prime is 40423993. The reversal of 40423986 is 68932404.

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 40423986.

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 11 ways as a sum of consecutive naturals, for example, 735 + ... + 9021.

It is an arithmetic number, because the mean of its divisors is an integer number (3663296).

Almost surely, 2^40423986 is an apocalyptic number.

40423986 is an abundant number, since it is smaller than the sum of its proper divisors (47495118).

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

40423986 is a wasteful number, since it uses less digits than its factorization.

40423986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8566 (or 8563 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 40423986 is about 6357.9860018720. The cubic root of 40423986 is about 343.1992880648.

It can be divided in two parts, 4042398 and 6, that added together give a palindrome (4042404).

The spelling of 40423986 in words is "forty million, four hundred twenty-three thousand, nine hundred eighty-six".