40140434 has 16 divisors (see below), whose sum is σ = 63887616. Its totient is φ = 18849600.

The previous prime is 40140431. The next prime is 40140461. The reversal of 40140434 is 43404104.

40140434 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×40140434³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (40140431) by changing a digit.

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, 20519 + ... + 22389.

It is an arithmetic number, because the mean of its divisors is an integer number (3992976).

Almost surely, 2^40140434 is an apocalyptic number.

40140434 is a deficient number, since it is larger than the sum of its proper divisors (23747182).

40140434 is a wasteful number, since it uses less digits than its factorization.

40140434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2521.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 40140434 is about 6335.6478753163. The cubic root of 40140434 is about 342.3949531330.

Adding to 40140434 its reverse (43404104), we get a palindrome (83544538).

The spelling of 40140434 in words is "forty million, one hundred forty thousand, four hundred thirty-four".