43808140 has 12 divisors (see below), whose sum is σ = 91997136. Its totient is φ = 17523248.

The previous prime is 43808137. The next prime is 43808143. The reversal of 43808140 is 4180834.

43808140 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (43808137) and next prime (43808143).

It is a junction number, because it is equal to n+sod(n) for n = 43808099 and 43808108.

It is not an unprimeable number, because it can be changed into a prime (43808143) 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, 1095184 + ... + 1095223.

It is an arithmetic number, because the mean of its divisors is an integer number (7666428).

Almost surely, 2^43808140 is an apocalyptic number.

It is an amenable number.

43808140 is an abundant number, since it is smaller than the sum of its proper divisors (48188996).

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

43808140 is a wasteful number, since it uses less digits than its factorization.

43808140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2190416 (or 2190414 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 43808140 is about 6618.7717893881. The cubic root of 43808140 is about 352.5209551112.

Adding to 43808140 its reverse (4180834), we get a palindrome (47988974).

The spelling of 43808140 in words is "forty-three million, eight hundred eight thousand, one hundred forty".