640314 has 12 divisors (see below), whose sum is σ = 1387386. Its totient is φ = 213432.

The previous prime is 640307. The next prime is 640333. The reversal of 640314 is 413046.

640314 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 613089 + 27225 = 783^2 + 165^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 35573 = 640314 / (6 + 4 + 0 + 3 + 1 + 4).

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 640314.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17769 + ... + 17804.

2⁶⁴⁰³¹⁴ is an apocalyptic number.

640314 is an abundant number, since it is smaller than the sum of its proper divisors (747072).

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

640314 is a wasteful number, since it uses less digits than its factorization.

640314 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35581 (or 35578 counting only the distinct ones).

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

The square root of 640314 is about 800.1962259346. The cubic root of 640314 is about 86.1914788906.

The spelling of 640314 in words is "six hundred forty thousand, three hundred fourteen".