40208340 has 24 divisors (see below), whose sum is σ = 112583520. Its totient is φ = 10722208.

The previous prime is 40208339. The next prime is 40208369. The reversal of 40208340 is 4380204.

It is a happy number.

40208340 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 335010 + ... + 335129.

It is an arithmetic number, because the mean of its divisors is an integer number (4690980).

Almost surely, 2^40208340 is an apocalyptic number.

It is an amenable number.

40208340 is an abundant number, since it is smaller than the sum of its proper divisors (72375180).

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

40208340 is a wasteful number, since it uses less digits than its factorization.

40208340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 670151 (or 670149 counting only the distinct ones).

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

The square root of 40208340 is about 6341.0046522613. The cubic root of 40208340 is about 342.5879220884.

Adding to 40208340 its reverse (4380204), we get a palindrome (44588544).

The spelling of 40208340 in words is "forty million, two hundred eight thousand, three hundred forty".