639762 has 8 divisors (see below), whose sum is σ = 1279536. Its totient is φ = 213252.

The previous prime is 639757. The next prime is 639833. The reversal of 639762 is 267936.

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

639762 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53308 + ... + 53319.

It is an arithmetic number, because the mean of its divisors is an integer number (159942).

2⁶³⁹⁷⁶² is an apocalyptic number.

639762 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

639762 is a wasteful number, since it uses less digits than its factorization.

639762 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106632.

The product of its digits is 13608, while the sum is 33.

The square root of 639762 is about 799.8512361683. The cubic root of 639762 is about 86.1667038715.

The spelling of 639762 in words is "six hundred thirty-nine thousand, seven hundred sixty-two".