639152 has 20 divisors (see below), whose sum is σ = 1268520. Its totient is φ = 311808.

The previous prime is 639151. The next prime is 639157. The reversal of 639152 is 251936.

It is not an unprimeable number, because it can be changed into a prime (639151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 224 + ... + 1152.

It is an arithmetic number, because the mean of its divisors is an integer number (63426).

2⁶³⁹¹⁵² is an apocalyptic number.

It is an amenable number.

639152 is a deficient number, since it is larger than the sum of its proper divisors (629368).

639152 is a wasteful number, since it uses less digits than its factorization.

639152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 980 (or 974 counting only the distinct ones).

The product of its digits is 1620, while the sum is 26.

The square root of 639152 is about 799.4698243211. The cubic root of 639152 is about 86.1393090988.

The spelling of 639152 in words is "six hundred thirty-nine thousand, one hundred fifty-two".