238139394012 has 192 divisors, whose sum is σ = 685326136320. Its totient is φ = 71055532800.

The previous prime is 238139394007. The next prime is 238139394013. The reversal of 238139394012 is 210493931832.

238139394012 is a `hidden beast` number, since 238 + 1 + 3 + 9 + 3 + 9 + 401 + 2 = 666.

It is a super-2 number, since 2×238139394012² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (238139394013) by changing a digit.

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, 6061143 + ... + 6100305.

It is an arithmetic number, because the mean of its divisors is an integer number (3569406960).

Almost surely, 2^238139394012 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 238139394012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (342663068160).

238139394012 is an abundant number, since it is smaller than the sum of its proper divisors (447186742308).

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

238139394012 is a wasteful number, since it uses less digits than its factorization.

238139394012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39321 (or 39313 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 45.

The spelling of 238139394012 in words is "two hundred thirty-eight billion, one hundred thirty-nine million, three hundred ninety-four thousand, twelve".