671447120 has 40 divisors (see below), whose sum is σ = 1565007720. Its totient is φ = 267909120.

The previous prime is 671447111. The next prime is 671447143. The reversal of 671447120 is 21744176.

It can be written as a sum of positive squares in 4 ways, for example, as 238640704 + 432806416 = 15448^2 + 20804^2 .

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

It is a congruent number.

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, 22460 + ... + 42980.

It is an arithmetic number, because the mean of its divisors is an integer number (39125193).

Almost surely, 2^671447120 is an apocalyptic number.

It is an amenable number.

671447120 is an abundant number, since it is smaller than the sum of its proper divisors (893560600).

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

671447120 is a wasteful number, since it uses less digits than its factorization.

671447120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20943 (or 20937 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 32.

The square root of 671447120 is about 25912.2966948127. The cubic root of 671447120 is about 875.6635489209.

The spelling of 671447120 in words is "six hundred seventy-one million, four hundred forty-seven thousand, one hundred twenty".