671738 has 16 divisors (see below), whose sum is σ = 1114560. Its totient is φ = 302016.

The previous prime is 671729. The next prime is 671743. The reversal of 671738 is 837176.

It is a happy number.

It is a Curzon 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, 353 + ... + 1211.

It is an arithmetic number, because the mean of its divisors is an integer number (69660).

2⁶⁷¹⁷³⁸ is an apocalyptic number.

671738 is a deficient number, since it is larger than the sum of its proper divisors (442822).

671738 is a wasteful number, since it uses less digits than its factorization.

671738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 901.

The product of its digits is 7056, while the sum is 32.

The square root of 671738 is about 819.5962420607. The cubic root of 671738 is about 87.5789980441.

The spelling of 671738 in words is "six hundred seventy-one thousand, seven hundred thirty-eight".