639048 has 16 divisors (see below), whose sum is σ = 1597680. Its totient is φ = 213008.

The previous prime is 639043. The next prime is 639049. The reversal of 639048 is 840936.

It is a nialpdrome in base 15.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 639048.

It is not an unprimeable number, because it can be changed into a prime (639043) by changing a digit.

639048 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, 13290 + ... + 13337.

It is an arithmetic number, because the mean of its divisors is an integer number (99855).

2⁶³⁹⁰⁴⁸ is an apocalyptic number.

It is an amenable number.

639048 is an abundant number, since it is smaller than the sum of its proper divisors (958632).

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

639048 is a wasteful number, since it uses less digits than its factorization.

639048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26636 (or 26632 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 639048 is about 799.4047785697. The cubic root of 639048 is about 86.1346367756.

The spelling of 639048 in words is "six hundred thirty-nine thousand, forty-eight".