8643980 has 12 divisors (see below), whose sum is σ = 18152400. Its totient is φ = 3457584.

The previous prime is 8643959. The next prime is 8643991. The reversal of 8643980 is 893468.

It is an unprimeable number.

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, 216080 + ... + 216119.

It is an arithmetic number, because the mean of its divisors is an integer number (1512700).

Almost surely, 2^8643980 is an apocalyptic number.

It is an amenable number.

8643980 is an abundant number, since it is smaller than the sum of its proper divisors (9508420).

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

8643980 is a wasteful number, since it uses less digits than its factorization.

8643980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432208 (or 432206 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 8643980 is about 2940.0646251401. The cubic root of 8643980 is about 205.2286166546.

The spelling of 8643980 in words is "eight million, six hundred forty-three thousand, nine hundred eighty".