638030 has 8 divisors (see below), whose sum is σ = 1148472. Its totient is φ = 255208.

The previous prime is 638023. The next prime is 638047. The reversal of 638030 is 30836.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 637993 and 638011.

It is a congruent number.

It is an unprimeable number.

638030 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31892 + ... + 31911.

It is an arithmetic number, because the mean of its divisors is an integer number (143559).

2⁶³⁸⁰³⁰ is an apocalyptic number.

638030 is a deficient number, since it is larger than the sum of its proper divisors (510442).

638030 is a wasteful number, since it uses less digits than its factorization.

638030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63810.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 638030 is about 798.7678010536. The cubic root of 638030 is about 86.0888751312.

Adding to 638030 its reverse (30836), we get a palindrome (668866).

The spelling of 638030 in words is "six hundred thirty-eight thousand, thirty".