640174 has 16 divisors (see below), whose sum is σ = 1015056. Its totient is φ = 302400.

The previous prime is 640163. The next prime is 640193. The reversal of 640174 is 471046.

640174 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 unprimeable number.

640174 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, 2929 + ... + 3139.

It is an arithmetic number, because the mean of its divisors is an integer number (63441).

2⁶⁴⁰¹⁷⁴ is an apocalyptic number.

640174 is a deficient number, since it is larger than the sum of its proper divisors (374882).

640174 is a wasteful number, since it uses less digits than its factorization.

640174 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 640174 is about 800.1087426094. The cubic root of 640174 is about 86.1851967194.

The spelling of 640174 in words is "six hundred forty thousand, one hundred seventy-four".