43840345 has 16 divisors (see below), whose sum is σ = 53467920. Its totient is φ = 34504704.

The previous prime is 43840343. The next prime is 43840393. The reversal of 43840345 is 54304834.

It can be written as a sum of positive squares in 8 ways, for example, as 2704 + 43837641 = 52^2 + 6621^2 .

It is a cyclic number.

It is not a de Polignac number, because 43840345 - 2¹ = 43840343 is a prime.

It is not an unprimeable number, because it can be changed into a prime (43840343) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 139909 + ... + 140221.

It is an arithmetic number, because the mean of its divisors is an integer number (3341745).

Almost surely, 2^43840345 is an apocalyptic number.

It is an amenable number.

43840345 is a deficient number, since it is larger than the sum of its proper divisors (9627575).

43840345 is a wasteful number, since it uses less digits than its factorization.

43840345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 684.

The product of its (nonzero) digits is 23040, while the sum is 31.

The square root of 43840345 is about 6621.2041956128. The cubic root of 43840345 is about 352.6073177256.

The spelling of 43840345 in words is "forty-three million, eight hundred forty thousand, three hundred forty-five".