646170 has 64 divisors (see below), whose sum is σ = 1886976. Its totient is φ = 138240.

The previous prime is 646169. The next prime is 646181. The reversal of 646170 is 71646.

646170 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 646170.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3480 + ... + 3660.

It is an arithmetic number, because the mean of its divisors is an integer number (29484).

2⁶⁴⁶¹⁷⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 646170, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (943488).

646170 is an abundant number, since it is smaller than the sum of its proper divisors (1240806).

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

646170 is a wasteful number, since it uses less digits than its factorization.

646170 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215.

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 646170 is about 803.8470003676. The cubic root of 646170 is about 86.4534370221.

The spelling of 646170 in words is "six hundred forty-six thousand, one hundred seventy".