671404340 has 12 divisors (see below), whose sum is σ = 1409949156. Its totient is φ = 268561728.

The previous prime is 671404301. The next prime is 671404351. The reversal of 671404340 is 43404176.

It can be written as a sum of positive squares in 2 ways, for example, as 172239376 + 499164964 = 13124^2 + 22342^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16785089 + ... + 16785128.

It is an arithmetic number, because the mean of its divisors is an integer number (117495763).

Almost surely, 2^671404340 is an apocalyptic number.

It is an amenable number.

671404340 is an abundant number, since it is smaller than the sum of its proper divisors (738544816).

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

671404340 is a wasteful number, since it uses less digits than its factorization.

671404340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33570226 (or 33570224 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 29.

The square root of 671404340 is about 25911.4712048544. The cubic root of 671404340 is about 875.6449514364.

The spelling of 671404340 in words is "six hundred seventy-one million, four hundred four thousand, three hundred forty".