639414 has 20 divisors (see below), whose sum is σ = 1433124. Its totient is φ = 213084.

The previous prime is 639391. The next prime is 639433. The reversal of 639414 is 414936.

639414 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

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 639414.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1812 + ... + 2135.

2⁶³⁹⁴¹⁴ is an apocalyptic number.

639414 is an abundant number, since it is smaller than the sum of its proper divisors (793710).

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

639414 is a wasteful number, since it uses less digits than its factorization.

639414 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3961 (or 3952 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

The square root of 639414 is about 799.6336661247. The cubic root of 639414 is about 86.1510775127.

The spelling of 639414 in words is "six hundred thirty-nine thousand, four hundred fourteen".