43680987 has 24 divisors (see below), whose sum is σ = 72781280. Its totient is φ = 24727680.

The previous prime is 43680983. The next prime is 43680997. The reversal of 43680987 is 78908634.

It is a happy number.

43680987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 43680987 - 2² = 43680983 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43680983) 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 23 ways as a sum of consecutive naturals, for example, 3687 + ... + 10047.

Almost surely, 2^43680987 is an apocalyptic number.

43680987 is a deficient number, since it is larger than the sum of its proper divisors (29100293).

43680987 is a wasteful number, since it uses less digits than its factorization.

43680987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6483 (or 6480 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 43680987 is about 6609.1593262684. The cubic root of 43680987 is about 352.1795609142.

The spelling of 43680987 in words is "forty-three million, six hundred eighty thousand, nine hundred eighty-seven".