43641980 has 12 divisors (see below), whose sum is σ = 91648200. Its totient is φ = 17456784.

The previous prime is 43641977. The next prime is 43641989. The reversal of 43641980 is 8914634.

It is a self number, because there is not a number n which added to its sum of digits gives 43641980.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43641989) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1091030 + ... + 1091069.

It is an arithmetic number, because the mean of its divisors is an integer number (7637350).

Almost surely, 2^43641980 is an apocalyptic number.

It is an amenable number.

43641980 is an abundant number, since it is smaller than the sum of its proper divisors (48006220).

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

43641980 is a wasteful number, since it uses less digits than its factorization.

43641980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2182108 (or 2182106 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 43641980 is about 6606.2076867141. The cubic root of 43641980 is about 352.0746979041.

The spelling of 43641980 in words is "forty-three million, six hundred forty-one thousand, nine hundred eighty".