639062 has 8 divisors (see below), whose sum is σ = 964656. Its totient is φ = 317512.

The previous prime is 639053. The next prime is 639083. The reversal of 639062 is 260936.

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

It is an Ulam number.

It is a nialpdrome in base 15.

It is a congruent number.

It is an unprimeable number.

639062 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, 578 + ... + 1269.

It is an arithmetic number, because the mean of its divisors is an integer number (120582).

2⁶³⁹⁰⁶² is an apocalyptic number.

639062 is a deficient number, since it is larger than the sum of its proper divisors (325594).

639062 is a wasteful number, since it uses less digits than its factorization.

639062 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2022.

The product of its (nonzero) digits is 1944, while the sum is 26.

The square root of 639062 is about 799.4135350368. The cubic root of 639062 is about 86.1352657717.

Adding to 639062 its reverse (260936), we get a palindrome (899998).

The spelling of 639062 in words is "six hundred thirty-nine thousand, sixty-two".