673680 has 80 divisors (see below), whose sum is σ = 2392704. Its totient is φ = 153600.

The previous prime is 673669. The next prime is 673747. The reversal of 673680 is 86376.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1480 + ... + 1880.

2⁶⁷³⁶⁸⁰ is an apocalyptic number.

673680 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 673680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1196352).

673680 is an abundant number, since it is smaller than the sum of its proper divisors (1719024).

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

673680 is a wasteful number, since it uses less digits than its factorization.

673680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424 (or 418 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 673680 is about 820.7801167182. The cubic root of 673680 is about 87.6633140411.

The spelling of 673680 in words is "six hundred seventy-three thousand, six hundred eighty".