638202 has 8 divisors (see below), whose sum is σ = 1276416. Its totient is φ = 212732.

The previous prime is 638201. The next prime is 638233. The reversal of 638202 is 202836.

It is a sphenic number, since it is the product of 3 distinct primes.

638202 is an admirable number.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (638201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53178 + ... + 53189.

It is an arithmetic number, because the mean of its divisors is an integer number (159552).

2⁶³⁸²⁰² is an apocalyptic number.

638202 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

638202 is a wasteful number, since it uses less digits than its factorization.

638202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106372.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 638202 is about 798.8754596306. The cubic root of 638202 is about 86.0966103767.

The spelling of 638202 in words is "six hundred thirty-eight thousand, two hundred two".