40816140 has 72 divisors (see below), whose sum is σ = 116812080. Its totient is φ = 10647936.

The previous prime is 40816121. The next prime is 40816187. The reversal of 40816140 is 4161804.

40816140 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 40816140.

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 23 ways as a sum of consecutive naturals, for example, 374406 + ... + 374514.

It is an arithmetic number, because the mean of its divisors is an integer number (1622390).

Almost surely, 2^40816140 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 40816140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58406040).

40816140 is an abundant number, since it is smaller than the sum of its proper divisors (75995940).

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

40816140 is a wasteful number, since it uses less digits than its factorization.

40816140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279 (or 198 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 40816140 is about 6388.7510516532. The cubic root of 40816140 is about 344.3055132457.

Adding to 40816140 its reverse (4161804), we get a palindrome (44977944).

The spelling of 40816140 in words is "forty million, eight hundred sixteen thousand, one hundred forty".