639334 has 16 divisors (see below), whose sum is σ = 1012320. Its totient is φ = 302400.

The previous prime is 639329. The next prime is 639337. The reversal of 639334 is 433936.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (639337) by changing a digit.

639334 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 7 ways as a sum of consecutive naturals, for example, 4159 + ... + 4309.

It is an arithmetic number, because the mean of its divisors is an integer number (63270).

2⁶³⁹³³⁴ is an apocalyptic number.

639334 is a deficient number, since it is larger than the sum of its proper divisors (372986).

639334 is a wasteful number, since it uses less digits than its factorization.

639334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255.

The product of its digits is 5832, while the sum is 28.

The square root of 639334 is about 799.5836416536. The cubic root of 639334 is about 86.1474844449.

It can be divided in two parts, 6 and 39334, that added together give a triangular number (39340 = T₂₈₀).

The spelling of 639334 in words is "six hundred thirty-nine thousand, three hundred thirty-four".