238563382638 has 128 divisors (see below), whose sum is σ = 563097600000. Its totient is φ = 67345610976.

The previous prime is 238563382619. The next prime is 238563382643. The reversal of 238563382638 is 836283365832.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 119340363 + ... + 119342361.

It is an arithmetic number, because the mean of its divisors is an integer number (4399200000).

Almost surely, 2^238563382638 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 238563382638, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (281548800000).

238563382638 is an abundant number, since it is smaller than the sum of its proper divisors (324534217362).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

238563382638 is a wasteful number, since it uses less digits than its factorization.

238563382638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2691 (or 2677 counting only the distinct ones).

The product of its digits is 29859840, while the sum is 57.

The spelling of 238563382638 in words is "two hundred thirty-eight billion, five hundred sixty-three million, three hundred eighty-two thousand, six hundred thirty-eight".