671819404 has 12 divisors (see below), whose sum is σ = 1237562200. Its totient is φ = 318230208.

The previous prime is 671819341. The next prime is 671819411. The reversal of 671819404 is 404918176.

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, 4419789 + ... + 4419940.

Almost surely, 2^671819404 is an apocalyptic number.

It is an amenable number.

671819404 is a deficient number, since it is larger than the sum of its proper divisors (565742796).

671819404 is a wasteful number, since it uses less digits than its factorization.

671819404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8839752 (or 8839750 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 671819404 is about 25919.4792385958. The cubic root of 671819404 is about 875.8253563009.

The spelling of 671819404 in words is "six hundred seventy-one million, eight hundred nineteen thousand, four hundred four".