43681364 has 12 divisors (see below), whose sum is σ = 80939124. Its totient is φ = 20555904.

The previous prime is 43681321. The next prime is 43681369. The reversal of 43681364 is 46318634.

It can be written as a sum of positive squares in 2 ways, for example, as 28408900 + 15272464 = 5330^2 + 3908^2 .

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43681369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 321119 + ... + 321254.

It is an arithmetic number, because the mean of its divisors is an integer number (6744927).

Almost surely, 2^43681364 is an apocalyptic number.

It is an amenable number.

43681364 is a deficient number, since it is larger than the sum of its proper divisors (37257760).

43681364 is a wasteful number, since it uses less digits than its factorization.

43681364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 642394 (or 642392 counting only the distinct ones).

The product of its digits is 41472, while the sum is 35.

The square root of 43681364 is about 6609.1878472321. The cubic root of 43681364 is about 352.1805741034.

Adding to 43681364 its reverse (46318634), we get a palindrome (89999998).

The spelling of 43681364 in words is "forty-three million, six hundred eighty-one thousand, three hundred sixty-four".