671748 has 48 divisors (see below), whose sum is σ = 1956864. Its totient is φ = 174240.

The previous prime is 671743. The next prime is 671753. The reversal of 671748 is 847176.

It is an interprime number because it is at equal distance from previous prime (671743) and next prime (671753).

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (671743) by changing a digit.

671748 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 561 + ... + 1287.

It is an arithmetic number, because the mean of its divisors is an integer number (40768).

2⁶⁷¹⁷⁴⁸ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 671748, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (978432).

671748 is an abundant number, since it is smaller than the sum of its proper divisors (1285116).

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

671748 is a wasteful number, since it uses less digits than its factorization.

671748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 752 (or 750 counting only the distinct ones).

The product of its digits is 9408, while the sum is 33.

The square root of 671748 is about 819.6023426028. The cubic root of 671748 is about 87.5794326310.

The spelling of 671748 in words is "six hundred seventy-one thousand, seven hundred forty-eight".