639262 has 16 divisors (see below), whose sum is σ = 1078560. Its totient is φ = 281952.

The previous prime is 639259. The next prime is 639263. The reversal of 639262 is 262936.

It is a d-powerful number, because it can be written as 6² + 3¹² + 2¹³ + 9⁵ + 6⁵ + 2¹⁵ .

It is a self number, because there is not a number n which added to its sum of digits gives 639262.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (639263) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64 + ... + 1132.

It is an arithmetic number, because the mean of its divisors is an integer number (67410).

2⁶³⁹²⁶² is an apocalyptic number.

639262 is a deficient number, since it is larger than the sum of its proper divisors (439298).

639262 is a wasteful number, since it uses less digits than its factorization.

639262 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1107.

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

The square root of 639262 is about 799.5386169536. The cubic root of 639262 is about 86.1442504275.

The spelling of 639262 in words is "six hundred thirty-nine thousand, two hundred sixty-two".