639016 has 16 divisors (see below), whose sum is σ = 1369440. Its totient is φ = 273840.

The previous prime is 639011. The next prime is 639043. The reversal of 639016 is 610936.

It is a pancake number, because a pancake can be divided into 639016 parts by 1130 straight cuts.

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (639011) by changing a digit.

639016 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 3 ways as a sum of consecutive naturals, for example, 5650 + ... + 5761.

It is an arithmetic number, because the mean of its divisors is an integer number (85590).

2⁶³⁹⁰¹⁶ is an apocalyptic number.

It is an amenable number.

639016 is an abundant number, since it is smaller than the sum of its proper divisors (730424).

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

639016 is a wasteful number, since it uses less digits than its factorization.

639016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11424 (or 11420 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 25.

The square root of 639016 is about 799.3847634275. The cubic root of 639016 is about 86.1331990357.

The spelling of 639016 in words is "six hundred thirty-nine thousand, sixteen".