638134 has 16 divisors (see below), whose sum is σ = 1152000. Its totient is φ = 258984.

The previous prime is 638123. The next prime is 638147. The reversal of 638134 is 431836.

It is a junction number, because it is equal to n+sod(n) for n = 638099 and 638108.

It is a congruent number.

It is an unprimeable number.

638134 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, 934 + ... + 1465.

It is an arithmetic number, because the mean of its divisors is an integer number (72000).

2⁶³⁸¹³⁴ is an apocalyptic number.

638134 is a deficient number, since it is larger than the sum of its proper divisors (513866).

638134 is a wasteful number, since it uses less digits than its factorization.

638134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2427.

The product of its digits is 1728, while the sum is 25.

The square root of 638134 is about 798.8328986716. The cubic root of 638134 is about 86.0935524225.

The spelling of 638134 in words is "six hundred thirty-eight thousand, one hundred thirty-four".