639302 has 8 divisors (see below), whose sum is σ = 1015416. Its totient is φ = 300832.

The previous prime is 639299. The next prime is 639307. The reversal of 639302 is 203936.

It is a happy number.

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

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (639307) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9368 + ... + 9435.

It is an arithmetic number, because the mean of its divisors is an integer number (126927).

2⁶³⁹³⁰² is an apocalyptic number.

639302 is a deficient number, since it is larger than the sum of its proper divisors (376114).

639302 is a wasteful number, since it uses less digits than its factorization.

639302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18822.

The product of its (nonzero) digits is 972, while the sum is 23.

The square root of 639302 is about 799.5636309888. The cubic root of 639302 is about 86.1460471338.

The spelling of 639302 in words is "six hundred thirty-nine thousand, three hundred two".