646118 has 16 divisors (see below), whose sum is σ = 1083456. Its totient is φ = 286440.

The previous prime is 646103. The next prime is 646147. The reversal of 646118 is 811646.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

646118 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 605 + ... + 1287.

It is an arithmetic number, because the mean of its divisors is an integer number (67716).

2⁶⁴⁶¹¹⁸ is an apocalyptic number.

646118 is a deficient number, since it is larger than the sum of its proper divisors (437338).

646118 is a wasteful number, since it uses less digits than its factorization.

646118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 739.

The product of its digits is 1152, while the sum is 26.

The square root of 646118 is about 803.8146552533. The cubic root of 646118 is about 86.4511178701.

The spelling of 646118 in words is "six hundred forty-six thousand, one hundred eighteen".