40840032 has 24 divisors (see below), whose sum is σ = 107205336. Its totient is φ = 13613312.

The previous prime is 40840031. The next prime is 40840043. The reversal of 40840032 is 23004804.

It is a happy number.

40840032 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×40840032² = 3335816427522048, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40839990 and 40840008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40840031) 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 3 ways as a sum of consecutive naturals, for example, 212613 + ... + 212804.

It is an arithmetic number, because the mean of its divisors is an integer number (4466889).

Almost surely, 2^40840032 is an apocalyptic number.

It is an amenable number.

40840032 is an abundant number, since it is smaller than the sum of its proper divisors (66365304).

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

40840032 is a wasteful number, since it uses less digits than its factorization.

40840032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425430 (or 425422 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 40840032 is about 6390.6206271379. The cubic root of 40840032 is about 344.3726806519.

Adding to 40840032 its reverse (23004804), we get a palindrome (63844836).

The spelling of 40840032 in words is "forty million, eight hundred forty thousand, thirty-two".