638793 has 16 divisors (see below), whose sum is σ = 964800. Its totient is φ = 417600.

The previous prime is 638767. The next prime is 638801. The reversal of 638793 is 397836.

It is a de Polignac number, because none of the positive numbers 2^k-638793 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (638893) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1393 + ... + 1793.

It is an arithmetic number, because the mean of its divisors is an integer number (60300).

2⁶³⁸⁷⁹³ is an apocalyptic number.

It is an amenable number.

638793 is a deficient number, since it is larger than the sum of its proper divisors (326007).

638793 is a wasteful number, since it uses less digits than its factorization.

638793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 469 (or 463 counting only the distinct ones).

The product of its digits is 27216, while the sum is 36.

The square root of 638793 is about 799.2452689882. The cubic root of 638793 is about 86.1231784530.

It can be divided in two parts, 638 and 793, that added together give a triangular number (1431 = T₅₃).

The spelling of 638793 in words is "six hundred thirty-eight thousand, seven hundred ninety-three".