638032 has 10 divisors (see below), whose sum is σ = 1236218. Its totient is φ = 319008.

The previous prime is 638023. The next prime is 638047. The reversal of 638032 is 230836.

It can be written as a sum of positive squares in only one way, i.e., 440896 + 197136 = 664^2 + 444^2 .

It is a junction number, because it is equal to n+sod(n) for n = 637994 and 638012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19923 + ... + 19954.

2⁶³⁸⁰³² is an apocalyptic number.

It is an amenable number.

638032 is a deficient number, since it is larger than the sum of its proper divisors (598186).

638032 is a wasteful number, since it uses less digits than its factorization.

638032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39885 (or 39879 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 638032 is about 798.7690529809. The cubic root of 638032 is about 86.0889650839.

Adding to 638032 its reverse (230836), we get a palindrome (868868).

The spelling of 638032 in words is "six hundred thirty-eight thousand, thirty-two".