639452 has 12 divisors (see below), whose sum is σ = 1220856. Its totient is φ = 290640.

The previous prime is 639451. The next prime is 639487. The reversal of 639452 is 254936.

639452 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 not an unprimeable number, because it can be changed into a prime (639451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7223 + ... + 7310.

It is an arithmetic number, because the mean of its divisors is an integer number (101738).

2⁶³⁹⁴⁵² is an apocalyptic number.

It is an amenable number.

639452 is a deficient number, since it is larger than the sum of its proper divisors (581404).

639452 is a wasteful number, since it uses less digits than its factorization.

639452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14548 (or 14546 counting only the distinct ones).

The product of its digits is 6480, while the sum is 29.

The square root of 639452 is about 799.6574266522. The cubic root of 639452 is about 86.1527841150.

It can be divided in two parts, 6394 and 52, that added together give a palindrome (6446).

The spelling of 639452 in words is "six hundred thirty-nine thousand, four hundred fifty-two".