639462 has 16 divisors (see below), whose sum is σ = 1287792. Its totient is φ = 211680.

The previous prime is 639451. The next prime is 639487. The reversal of 639462 is 264936.

639462 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

639462 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, 912 + ... + 1452.

It is an arithmetic number, because the mean of its divisors is an integer number (80487).

2⁶³⁹⁴⁶² is an apocalyptic number.

639462 is an abundant number, since it is smaller than the sum of its proper divisors (648330).

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

639462 is a wasteful number, since it uses less digits than its factorization.

639462 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 743.

The product of its digits is 7776, while the sum is 30.

The square root of 639462 is about 799.6636793052. The cubic root of 639462 is about 86.1532332096.

The spelling of 639462 in words is "six hundred thirty-nine thousand, four hundred sixty-two".