646002 has 32 divisors (see below), whose sum is σ = 1641600. Its totient is φ = 184464.

The previous prime is 645979. The next prime is 646003. The reversal of 646002 is 200646.

646002 is a `hidden beast` number, since 64 + 600 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (646003) by changing a digit.

646002 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 15 ways as a sum of consecutive naturals, for example, 477 + ... + 1232.

It is an arithmetic number, because the mean of its divisors is an integer number (51300).

2⁶⁴⁶⁰⁰² is an apocalyptic number.

646002 is an abundant number, since it is smaller than the sum of its proper divisors (995598).

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

646002 is a wasteful number, since it uses less digits than its factorization.

646002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1727 (or 1721 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 646002 is about 803.7424960769. The cubic root of 646002 is about 86.4459439288.

Adding to 646002 its reverse (200646), we get a palindrome (846648).

The spelling of 646002 in words is "six hundred forty-six thousand, two".