43718138 has 16 divisors (see below), whose sum is σ = 68246280. Its totient is φ = 20978496.

The previous prime is 43718137. The next prime is 43718159. The reversal of 43718138 is 83181734.

It can be written as a sum of positive squares in 4 ways, for example, as 41306329 + 2411809 = 6427^2 + 1553^2 .

It is a super-2 number, since 2×43718138² = 3822551180374088, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 43718098 and 43718107.

It is not an unprimeable number, because it can be changed into a prime (43718137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7856 + ... + 12212.

Almost surely, 2^43718138 is an apocalyptic number.

43718138 is a deficient number, since it is larger than the sum of its proper divisors (24528142).

43718138 is a wasteful number, since it uses less digits than its factorization.

43718138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4561.

The product of its digits is 16128, while the sum is 35.

The square root of 43718138 is about 6611.9692981743. The cubic root of 43718138 is about 352.2793763886.

The spelling of 43718138 in words is "forty-three million, seven hundred eighteen thousand, one hundred thirty-eight".