639348 has 12 divisors (see below), whose sum is σ = 1491840. Its totient is φ = 213112.

The previous prime is 639337. The next prime is 639361. The reversal of 639348 is 843936.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

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 639348.

It is an unprimeable number.

639348 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, 26628 + ... + 26651.

It is an arithmetic number, because the mean of its divisors is an integer number (124320).

2⁶³⁹³⁴⁸ is an apocalyptic number.

It is an amenable number.

639348 is an abundant number, since it is smaller than the sum of its proper divisors (852492).

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

639348 is a wasteful number, since it uses less digits than its factorization.

639348 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53286 (or 53284 counting only the distinct ones).

The product of its digits is 15552, while the sum is 33.

The square root of 639348 is about 799.5923961619. The cubic root of 639348 is about 86.1481132534.

It can be divided in two parts, 6393 and 48, that added together give a triangular number (6441 = T₁₁₃).

The spelling of 639348 in words is "six hundred thirty-nine thousand, three hundred forty-eight".