639046 has 16 divisors (see below), whose sum is σ = 1028160. Its totient is φ = 297000.

The previous prime is 639043. The next prime is 639049. The reversal of 639046 is 640936.

It is an interprime number because it is at equal distance from previous prime (639043) and next prime (639049).

It is a plaindrome in base 12.

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 (639043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2421 + ... + 2671.

It is an arithmetic number, because the mean of its divisors is an integer number (64260).

2⁶³⁹⁰⁴⁶ is an apocalyptic number.

639046 is a deficient number, since it is larger than the sum of its proper divisors (389114).

639046 is a wasteful number, since it uses less digits than its factorization.

639046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 639046 is about 799.4035276380. The cubic root of 639046 is about 86.1345469183.

The spelling of 639046 in words is "six hundred thirty-nine thousand, forty-six".