40381432 has 32 divisors (see below), whose sum is σ = 93189600. Its totient is φ = 15974784.

The previous prime is 40381423. The next prime is 40381447. The reversal of 40381432 is 23418304.

40381432 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 40381397 and 40381406.

It is a congruent number.

It is an unprimeable number.

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, 27007 + ... + 28462.

It is an arithmetic number, because the mean of its divisors is an integer number (2912175).

Almost surely, 2^40381432 is an apocalyptic number.

It is an amenable number.

40381432 is an abundant number, since it is smaller than the sum of its proper divisors (52808168).

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

40381432 is a wasteful number, since it uses less digits than its factorization.

40381432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55495 (or 55491 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 40381432 is about 6354.6386207242. The cubic root of 40381432 is about 343.0788180862.

Adding to 40381432 its reverse (23418304), we get a palindrome (63799736).

The spelling of 40381432 in words is "forty million, three hundred eighty-one thousand, four hundred thirty-two".