646602 has 32 divisors (see below), whose sum is σ = 1439424. Its totient is φ = 192000.

The previous prime is 646577. The next prime is 646609. The reversal of 646602 is 206646.

646602 is nontrivially palindromic in base 15.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646609) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6352 + ... + 6452.

It is an arithmetic number, because the mean of its divisors is an integer number (44982).

2⁶⁴⁶⁶⁰² is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 646602, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (719712).

646602 is an abundant number, since it is smaller than the sum of its proper divisors (792822).

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

646602 is a wasteful number, since it uses less digits than its factorization.

646602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 646602 is about 804.1156633221. The cubic root of 646602 is about 86.4726990145.

It can be divided in two parts, 64 and 6602, that added together give a palindrome (6666).

The spelling of 646602 in words is "six hundred forty-six thousand, six hundred two".