673740 has 72 divisors (see below), whose sum is σ = 2162160. Its totient is φ = 169344.

The previous prime is 673669. The next prime is 673747. The reversal of 673740 is 47376.

673740 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (673747) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3322 + ... + 3518.

It is an arithmetic number, because the mean of its divisors is an integer number (30030).

2⁶⁷³⁷⁴⁰ is an apocalyptic number.

673740 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 673740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1081080).

673740 is an abundant number, since it is smaller than the sum of its proper divisors (1488420).

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

673740 is a wasteful number, since it uses less digits than its factorization.

673740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231 (or 226 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 27.

The square root of 673740 is about 820.8166664975. The cubic root of 673740 is about 87.6659164848.

The spelling of 673740 in words is "six hundred seventy-three thousand, seven hundred forty".