236238504138 has 144 divisors (see below), whose sum is σ = 642359573856. Its totient is φ = 62193821760.

The previous prime is 236238504127. The next prime is 236238504163. The reversal of 236238504138 is 831405832632.

236238504138 is a `hidden beast` number, since 2 + 3 + 6 + 2 + 3 + 8 + 504 + 138 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 236238504093 and 236238504102.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 6529045 + ... + 6565127.

It is an arithmetic number, because the mean of its divisors is an integer number (4460830374).

Almost surely, 2^236238504138 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 236238504138, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (321179786928).

236238504138 is an abundant number, since it is smaller than the sum of its proper divisors (406121069718).

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

236238504138 is a wasteful number, since it uses less digits than its factorization.

236238504138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36689 (or 36679 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 45.

The spelling of 236238504138 in words is "two hundred thirty-six billion, two hundred thirty-eight million, five hundred four thousand, one hundred thirty-eight".