43808138 has 8 divisors (see below), whose sum is σ = 71686080. Its totient is φ = 19912780.

The previous prime is 43808137. The next prime is 43808143. The reversal of 43808138 is 83180834.

43808138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 43808098 and 43808107.

It is not an unprimeable number, because it can be changed into a prime (43808137) 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, 995618 + ... + 995661.

It is an arithmetic number, because the mean of its divisors is an integer number (8960760).

Almost surely, 2^43808138 is an apocalyptic number.

43808138 is a deficient number, since it is larger than the sum of its proper divisors (27877942).

43808138 is a wasteful number, since it uses less digits than its factorization.

43808138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1991292.

The product of its (nonzero) digits is 18432, while the sum is 35.

The square root of 43808138 is about 6618.7716383027. The cubic root of 43808138 is about 352.5209497466.

The spelling of 43808138 in words is "forty-three million, eight hundred eight thousand, one hundred thirty-eight".