43661386 has 16 divisors (see below), whose sum is σ = 66322080. Its totient is φ = 21556080.

The previous prime is 43661381. The next prime is 43661417. The reversal of 43661386 is 68316634.

It is not an unprimeable number, because it can be changed into a prime (43661381) 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 7 ways as a sum of consecutive naturals, for example, 65925 + ... + 66583.

It is an arithmetic number, because the mean of its divisors is an integer number (4145130).

Almost surely, 2^43661386 is an apocalyptic number.

43661386 is a deficient number, since it is larger than the sum of its proper divisors (22660694).

43661386 is a wasteful number, since it uses less digits than its factorization.

43661386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1029.

The product of its digits is 62208, while the sum is 37.

The square root of 43661386 is about 6607.6762935241. The cubic root of 43661386 is about 352.1268751055.

The spelling of 43661386 in words is "forty-three million, six hundred sixty-one thousand, three hundred eighty-six".