671840334 has 48 divisors (see below), whose sum is σ = 1596304944. Its totient is φ = 202521600.

The previous prime is 671840311. The next prime is 671840381. The reversal of 671840334 is 433048176.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29424 + ... + 47004.

It is an arithmetic number, because the mean of its divisors is an integer number (33256353).

Almost surely, 2^671840334 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 671840334, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (798152472).

671840334 is an abundant number, since it is smaller than the sum of its proper divisors (924464610).

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

671840334 is a wasteful number, since it uses less digits than its factorization.

671840334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17793 (or 17790 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

The square root of 671840334 is about 25919.8829858470. The cubic root of 671840334 is about 875.8344514209.

The spelling of 671840334 in words is "six hundred seventy-one million, eight hundred forty thousand, three hundred thirty-four".