43864138 has 8 divisors (see below), whose sum is σ = 65827332. Its totient is φ = 21921696.

The previous prime is 43864127. The next prime is 43864159. The reversal of 43864138 is 83146834.

It can be written as a sum of positive squares in 2 ways, for example, as 43864129 + 9 = 6623^2 + 3^2 .

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 = 43864097 and 43864106.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2206 + ... + 9622.

Almost surely, 2^43864138 is an apocalyptic number.

43864138 is a deficient number, since it is larger than the sum of its proper divisors (21963194).

43864138 is a wasteful number, since it uses less digits than its factorization.

43864138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10376.

The product of its digits is 55296, while the sum is 37.

The square root of 43864138 is about 6623.0006794504. Note that the first 3 decimals coincide. The cubic root of 43864138 is about 352.6710951179.

The spelling of 43864138 in words is "forty-three million, eight hundred sixty-four thousand, one hundred thirty-eight".