40840392 has 64 divisors (see below), whose sum is σ = 111628800. Its totient is φ = 12395520.

The previous prime is 40840379. The next prime is 40840403. The reversal of 40840392 is 29304804.

It is a happy number.

40840392 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 15 ways as a sum of consecutive naturals, for example, 11034 + ... + 14262.

It is an arithmetic number, because the mean of its divisors is an integer number (1744200).

Almost surely, 2^40840392 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40840392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55814400).

40840392 is an abundant number, since it is smaller than the sum of its proper divisors (70788408).

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

40840392 is a wasteful number, since it uses less digits than its factorization.

40840392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3286 (or 3282 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 40840392 is about 6390.6487933542. The cubic root of 40840392 is about 344.3736925169.

The spelling of 40840392 in words is "forty million, eight hundred forty thousand, three hundred ninety-two".