238663406 has 4 divisors (see below), whose sum is σ = 357995112. Its totient is φ = 119331702.

The previous prime is 238663367. The next prime is 238663409. The reversal of 238663406 is 604366832.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 238663406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (238663409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59665850 + ... + 59665853.

It is an arithmetic number, because the mean of its divisors is an integer number (89498778).

Almost surely, 2^238663406 is an apocalyptic number.

238663406 is a deficient number, since it is larger than the sum of its proper divisors (119331706).

238663406 is a wasteful number, since it uses less digits than its factorization.

238663406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119331705.

The product of its (nonzero) digits is 124416, while the sum is 38.

The square root of 238663406 is about 15448.7347702004. The cubic root of 238663406 is about 620.2907117418.

It can be divided in two parts, 23866 and 3406, that added together give a palindrome (27272).

The spelling of 238663406 in words is "two hundred thirty-eight million, six hundred sixty-three thousand, four hundred six".