640014 has 8 divisors (see below), whose sum is σ = 1280040. Its totient is φ = 213336.

The previous prime is 640009. The next prime is 640019. The reversal of 640014 is 410046.

It is an interprime number because it is at equal distance from previous prime (640009) and next prime (640019).

It is a sphenic number, since it is the product of 3 distinct primes.

640014 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 639975 and 640002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640019) by changing a digit.

640014 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 3 ways as a sum of consecutive naturals, for example, 53329 + ... + 53340.

It is an arithmetic number, because the mean of its divisors is an integer number (160005).

2⁶⁴⁰⁰¹⁴ is an apocalyptic number.

640014 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

640014 is a wasteful number, since it uses less digits than its factorization.

640014 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106674.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 640014 is about 800.0087499521. The cubic root of 640014 is about 86.1780159735.

The spelling of 640014 in words is "six hundred forty thousand, fourteen".