43712018 has 12 divisors (see below), whose sum is σ = 76273182. Its totient is φ = 18733680.

The previous prime is 43712017. The next prime is 43712041. The reversal of 43712018 is 81021734.

It can be written as a sum of positive squares in only one way, i.e., 38725729 + 4986289 = 6223^2 + 2233^2 .

It is not an unprimeable number, because it can be changed into a prime (43712017) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 222923 + ... + 223118.

Almost surely, 2^43712018 is an apocalyptic number.

43712018 is a deficient number, since it is larger than the sum of its proper divisors (32561164).

43712018 is a wasteful number, since it uses less digits than its factorization.

43712018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446057 (or 446050 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 43712018 is about 6611.5064849095. The cubic root of 43712018 is about 352.2629373659.

The spelling of 43712018 in words is "forty-three million, seven hundred twelve thousand, eighteen".