673820 has 24 divisors (see below), whose sum is σ = 1617504. Its totient is φ = 230976.

The previous prime is 673817. The next prime is 673837. The reversal of 673820 is 28376.

It is a self number, because there is not a number n which added to its sum of digits gives 673820.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2267 + ... + 2546.

It is an arithmetic number, because the mean of its divisors is an integer number (67396).

2⁶⁷³⁸²⁰ is an apocalyptic number.

It is an amenable number.

673820 is an abundant number, since it is smaller than the sum of its proper divisors (943684).

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

673820 is a wasteful number, since it uses less digits than its factorization.

673820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4829 (or 4827 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 673820 is about 820.8653970049. The cubic root of 673820 is about 87.6693861693.

The spelling of 673820 in words is "six hundred seventy-three thousand, eight hundred twenty".