646068 has 24 divisors (see below), whose sum is σ = 1596672. Its totient is φ = 202624.

The previous prime is 646067. The next prime is 646073. The reversal of 646068 is 860646.

It is a happy number.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646067) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1380 + ... + 1787.

It is an arithmetic number, because the mean of its divisors is an integer number (66528).

2⁶⁴⁶⁰⁶⁸ is an apocalyptic number.

646068 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

646068 is an abundant number, since it is smaller than the sum of its proper divisors (950604).

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

646068 is a wasteful number, since it uses less digits than its factorization.

646068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3191 (or 3189 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 646068 is about 803.7835529544. The cubic root of 646068 is about 86.4488877989.

The spelling of 646068 in words is "six hundred forty-six thousand, sixty-eight".