639096 has 32 divisors (see below), whose sum is σ = 1651200. Its totient is φ = 205920.

The previous prime is 639091. The next prime is 639137. The reversal of 639096 is 690936.

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 639096.

It is not an unprimeable number, because it can be changed into a prime (639091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 315 + ... + 1173.

It is an arithmetic number, because the mean of its divisors is an integer number (51600).

2⁶³⁹⁰⁹⁶ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 639096, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (825600).

639096 is an abundant number, since it is smaller than the sum of its proper divisors (1012104).

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

639096 is a wasteful number, since it uses less digits than its factorization.

639096 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 899 (or 895 counting only the distinct ones).

The product of its (nonzero) digits is 8748, while the sum is 33.

The square root of 639096 is about 799.4348003433. The cubic root of 639096 is about 86.1367932955.

The spelling of 639096 in words is "six hundred thirty-nine thousand, ninety-six".