671844424 has 8 divisors (see below), whose sum is σ = 1259708310. Its totient is φ = 335922208.

The previous prime is 671844419. The next prime is 671844449. The reversal of 671844424 is 424448176.

It can be written as a sum of positive squares in only one way, i.e., 561216100 + 110628324 = 23690^2 + 10518^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41990269 + ... + 41990284.

Almost surely, 2^671844424 is an apocalyptic number.

It is an amenable number.

671844424 is a deficient number, since it is larger than the sum of its proper divisors (587863886).

671844424 is a wasteful number, since it uses less digits than its factorization.

671844424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83980559 (or 83980555 counting only the distinct ones).

The product of its digits is 172032, while the sum is 40.

The square root of 671844424 is about 25919.9618826880. The cubic root of 671844424 is about 875.8362287061.

The spelling of 671844424 in words is "six hundred seventy-one million, eight hundred forty-four thousand, four hundred twenty-four".