640182 has 16 divisors (see below), whose sum is σ = 1336320. Its totient is φ = 204072.

The previous prime is 640163. The next prime is 640193. The reversal of 640182 is 281046.

640182 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 640182.

It is an unprimeable number.

640182 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 7 ways as a sum of consecutive naturals, for example, 2182 + ... + 2457.

It is an arithmetic number, because the mean of its divisors is an integer number (83520).

2⁶⁴⁰¹⁸² is an apocalyptic number.

640182 is an abundant number, since it is smaller than the sum of its proper divisors (696138).

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

640182 is a wasteful number, since it uses less digits than its factorization.

640182 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4667.

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 640182 is about 800.1137419142. The cubic root of 640182 is about 86.1855557253.

The spelling of 640182 in words is "six hundred forty thousand, one hundred eighty-two".