671908 has 24 divisors (see below), whose sum is σ = 1280664. Its totient is φ = 307200.

The previous prime is 671903. The next prime is 671911. The reversal of 671908 is 809176.

It can be written as a sum of positive squares in 4 ways, for example, as 97344 + 574564 = 312^2 + 758^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 671908.

It is not an unprimeable number, because it can be changed into a prime (671903) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2668 + ... + 2908.

It is an arithmetic number, because the mean of its divisors is an integer number (53361).

2⁶⁷¹⁹⁰⁸ is an apocalyptic number.

671908 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

671908 is a deficient number, since it is larger than the sum of its proper divisors (608756).

671908 is a wasteful number, since it uses less digits than its factorization.

671908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303 (or 301 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 671908 is about 819.6999451019. The cubic root of 671908 is about 87.5863854352.

The spelling of 671908 in words is "six hundred seventy-one thousand, nine hundred eight".