43349218 has 48 divisors (see below), whose sum is σ = 77824152. Its totient is φ = 18022400.

The previous prime is 43349209. The next prime is 43349219. The reversal of 43349218 is 81294334.

43349218 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 41692849 + 1656369 = 6457^2 + 1287^2 .

It is a Harshad number since it is a multiple of its sum of digits (34).

It is not an unprimeable number, because it can be changed into a prime (43349219) 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 23 ways as a sum of consecutive naturals, for example, 168546 + ... + 168802.

Almost surely, 2^43349218 is an apocalyptic number.

43349218 is a deficient number, since it is larger than the sum of its proper divisors (34474934).

43349218 is a wasteful number, since it uses less digits than its factorization.

43349218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339 (or 328 counting only the distinct ones).

The product of its digits is 20736, while the sum is 34.

The square root of 43349218 is about 6584.0123025401. The cubic root of 43349218 is about 351.2856606947.

Subtracting 43349218 from its reverse (81294334), we obtain a triangular number (37945116 = T₈₇₁₁).

The spelling of 43349218 in words is "forty-three million, three hundred forty-nine thousand, two hundred eighteen".