43212340 has 12 divisors (see below), whose sum is σ = 90745956. Its totient is φ = 17284928.

The previous prime is 43212307. The next prime is 43212341. The reversal of 43212340 is 4321234.

43212340 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 2 ways, for example, as 24324624 + 18887716 = 4932^2 + 4346^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43212341) 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 3 ways as a sum of consecutive naturals, for example, 1080289 + ... + 1080328.

It is an arithmetic number, because the mean of its divisors is an integer number (7562163).

Almost surely, 2^43212340 is an apocalyptic number.

It is an amenable number.

43212340 is an abundant number, since it is smaller than the sum of its proper divisors (47533616).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

43212340 is a wasteful number, since it uses less digits than its factorization.

43212340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2160626 (or 2160624 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 43212340 is about 6573.6093586400. The cubic root of 43212340 is about 350.9155350150.

Adding to 43212340 its reverse (4321234), we get a palindrome (47533574).

The spelling of 43212340 in words is "forty-three million, two hundred twelve thousand, three hundred forty".