638703 has 24 divisors (see below), whose sum is σ = 1022112. Its totient is φ = 381888.

The previous prime is 638699. The next prime is 638717. The reversal of 638703 is 307836.

It is a happy number.

It is not a de Polignac number, because 638703 - 2² = 638699 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (638303) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6150 + ... + 6252.

It is an arithmetic number, because the mean of its divisors is an integer number (42588).

2⁶³⁸⁷⁰³ is an apocalyptic number.

638703 is a deficient number, since it is larger than the sum of its proper divisors (383409).

638703 is a wasteful number, since it uses less digits than its factorization.

638703 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175 (or 172 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 638703 is about 799.1889638878. The cubic root of 638703 is about 86.1191336111.

The spelling of 638703 in words is "six hundred thirty-eight thousand, seven hundred three".