663238 has 8 divisors (see below), whose sum is σ = 1053432. Its totient is φ = 312096.

The previous prime is 663209. The next prime is 663239. The reversal of 663238 is 832366.

663238 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663239) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9720 + ... + 9787.

It is an arithmetic number, because the mean of its divisors is an integer number (131679).

2⁶⁶³²³⁸ is an apocalyptic number.

663238 is a deficient number, since it is larger than the sum of its proper divisors (390194).

663238 is a wasteful number, since it uses less digits than its factorization.

663238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19526.

The product of its digits is 5184, while the sum is 28.

The square root of 663238 is about 814.3942534178. The cubic root of 663238 is about 87.2080281866.

It can be divided in two parts, 6632 and 38, that added together give a triangular number (6670 = T₁₁₅).

The spelling of 663238 in words is "six hundred sixty-three thousand, two hundred thirty-eight".