638596 has 12 divisors (see below), whose sum is σ = 1277248. Its totient is φ = 273672.

The previous prime is 638587. The next prime is 638621. The reversal of 638596 is 695836.

638596 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

638596 is an admirable number.

It is a nialpdrome in base 15.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11376 + ... + 11431.

2⁶³⁸⁵⁹⁶ is an apocalyptic number.

It is an amenable number.

638596 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.

638596 is a wasteful number, since it uses less digits than its factorization.

638596 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22818 (or 22816 counting only the distinct ones).

The product of its digits is 38880, while the sum is 37.

The square root of 638596 is about 799.1220182175. The cubic root of 638596 is about 86.1143242490.

The spelling of 638596 in words is "six hundred thirty-eight thousand, five hundred ninety-six".