671946988 has 24 divisors (see below), whose sum is σ = 1197378000. Its totient is φ = 329853888.

The previous prime is 671946983. The next prime is 671946997. The reversal of 671946988 is 889649176.

It is not an unprimeable number, because it can be changed into a prime (671946983) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 262338 + ... + 264886.

It is an arithmetic number, because the mean of its divisors is an integer number (49890750).

Almost surely, 2^671946988 is an apocalyptic number.

It is an amenable number.

671946988 is a deficient number, since it is larger than the sum of its proper divisors (525431012).

671946988 is a wasteful number, since it uses less digits than its factorization.

671946988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3729 (or 3727 counting only the distinct ones).

The product of its digits is 5225472, while the sum is 58.

The square root of 671946988 is about 25921.9402823168. The cubic root of 671946988 is about 875.8807949246.

The spelling of 671946988 in words is "six hundred seventy-one million, nine hundred forty-six thousand, nine hundred eighty-eight".