638252 has 6 divisors (see below), whose sum is σ = 1116948. Its totient is φ = 319124.

The previous prime is 638233. The next prime is 638263. The reversal of 638252 is 252836.

It is an unprimeable number.

638252 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79778 + ... + 79785.

It is an arithmetic number, because the mean of its divisors is an integer number (186158).

2⁶³⁸²⁵² is an apocalyptic number.

It is an amenable number.

638252 is a deficient number, since it is larger than the sum of its proper divisors (478696).

638252 is a wasteful number, since it uses less digits than its factorization.

638252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159567 (or 159565 counting only the distinct ones).

The product of its digits is 2880, while the sum is 26.

The square root of 638252 is about 798.9067530069. The cubic root of 638252 is about 86.0988587339.

The spelling of 638252 in words is "six hundred thirty-eight thousand, two hundred fifty-two".