671245872 has 40 divisors (see below), whose sum is σ = 1891694400. Its totient is φ = 203407680.

The previous prime is 671245859. The next prime is 671245931. The reversal of 671245872 is 278542176.

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, 635122 + ... + 636177.

It is an arithmetic number, because the mean of its divisors is an integer number (47292360).

Almost surely, 2^671245872 is an apocalyptic number.

It is an amenable number.

671245872 is an abundant number, since it is smaller than the sum of its proper divisors (1220448528).

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

671245872 is a wasteful number, since it uses less digits than its factorization.

671245872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1271321 (or 1271315 counting only the distinct ones).

The product of its digits is 188160, while the sum is 42.

The square root of 671245872 is about 25908.4131509438. The cubic root of 671245872 is about 875.5760547402.

The spelling of 671245872 in words is "six hundred seventy-one million, two hundred forty-five thousand, eight hundred seventy-two".