671230640 has 40 divisors (see below), whose sum is σ = 1562109840. Its totient is φ = 268234496.

The previous prime is 671230621. The next prime is 671230657. The reversal of 671230640 is 46032176.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94907 + ... + 101733.

It is an arithmetic number, because the mean of its divisors is an integer number (39052746).

Almost surely, 2^671230640 is an apocalyptic number.

It is an amenable number.

671230640 is an abundant number, since it is smaller than the sum of its proper divisors (890879200).

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

671230640 is a wasteful number, since it uses less digits than its factorization.

671230640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8069 (or 8063 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 671230640 is about 25908.1191907093. The cubic root of 671230640 is about 875.5694317942.

The spelling of 671230640 in words is "six hundred seventy-one million, two hundred thirty thousand, six hundred forty".