43256938 has 4 divisors (see below), whose sum is σ = 64885410. Its totient is φ = 21628468.

The previous prime is 43256933. The next prime is 43256947. The reversal of 43256938 is 83965234.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83965234 = 2 ⋅41982617.

It can be written as a sum of positive squares in only one way, i.e., 43256929 + 9 = 6577^2 + 3^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 43256938.

It is not an unprimeable number, because it can be changed into a prime (43256933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10814233 + ... + 10814236.

Almost surely, 2^43256938 is an apocalyptic number.

43256938 is a deficient number, since it is larger than the sum of its proper divisors (21628472).

43256938 is a wasteful number, since it uses less digits than its factorization.

43256938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21628471.

The product of its digits is 155520, while the sum is 40.

The square root of 43256938 is about 6577.0006842025. Note that the first 3 decimals coincide. The cubic root of 43256938 is about 351.0362162072.

The spelling of 43256938 in words is "forty-three million, two hundred fifty-six thousand, nine hundred thirty-eight".