673818 has 8 divisors (see below), whose sum is σ = 1347648. Its totient is φ = 224604.

The previous prime is 673817. The next prime is 673837. The reversal of 673818 is 818376.

It is a sphenic number, since it is the product of 3 distinct primes.

673818 is an admirable number.

It is a Curzon number.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (673811) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 56146 + ... + 56157.

It is an arithmetic number, because the mean of its divisors is an integer number (168456).

2⁶⁷³⁸¹⁸ is an apocalyptic number.

673818 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

673818 is a wasteful number, since it uses less digits than its factorization.

673818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112308.

The product of its digits is 8064, while the sum is 33.

The square root of 673818 is about 820.8641787775. The cubic root of 673818 is about 87.6692994305.

The spelling of 673818 in words is "six hundred seventy-three thousand, eight hundred eighteen".