638196 has 24 divisors (see below), whose sum is σ = 1604064. Its totient is φ = 196320.

The previous prime is 638179. The next prime is 638201. The reversal of 638196 is 691836.

It is a congruent number.

It is an unprimeable number.

638196 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1890 + ... + 2201.

It is an arithmetic number, because the mean of its divisors is an integer number (66836).

2⁶³⁸¹⁹⁶ is an apocalyptic number.

It is an amenable number.

638196 is an abundant number, since it is smaller than the sum of its proper divisors (965868).

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

638196 is a wasteful number, since it uses less digits than its factorization.

638196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4111 (or 4109 counting only the distinct ones).

The product of its digits is 7776, while the sum is 33.

The square root of 638196 is about 798.8717043431. The cubic root of 638196 is about 86.0963405660.

The spelling of 638196 in words is "six hundred thirty-eight thousand, one hundred ninety-six".