673618 has 16 divisors (see below), whose sum is σ = 1121184. Its totient is φ = 300960.

The previous prime is 673613. The next prime is 673619. The reversal of 673618 is 816376.

It is a super-2 number, since 2×673618² = 907522419848, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 673618.

It is not an unprimeable number, because it can be changed into a prime (673613) by changing a digit.

673618 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 7 ways as a sum of consecutive naturals, for example, 1246 + ... + 1702.

It is an arithmetic number, because the mean of its divisors is an integer number (70074).

2⁶⁷³⁶¹⁸ is an apocalyptic number.

673618 is a deficient number, since it is larger than the sum of its proper divisors (447566).

673618 is a wasteful number, since it uses less digits than its factorization.

673618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 537.

The product of its digits is 6048, while the sum is 31.

The square root of 673618 is about 820.7423469031. The cubic root of 673618 is about 87.6606246870.

The spelling of 673618 in words is "six hundred seventy-three thousand, six hundred eighteen".