238391136 has 288 divisors, whose sum is σ = 785453760. Its totient is φ = 68124672.

The previous prime is 238391117. The next prime is 238391149. The reversal of 238391136 is 631193832.

238391136 is a `hidden beast` number, since 238 + 391 + 1 + 36 = 666.

238391136 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (288).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 238391136.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3265596 + ... + 3265668.

It is an arithmetic number, because the mean of its divisors is an integer number (2727270).

Almost surely, 2^238391136 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 238391136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (392726880).

238391136 is an abundant number, since it is smaller than the sum of its proper divisors (547062624).

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

238391136 is a wasteful number, since it uses less digits than its factorization.

238391136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158 (or 147 counting only the distinct ones).

The product of its digits is 23328, while the sum is 36.

The square root of 238391136 is about 15439.9202070477. The cubic root of 238391136 is about 620.0547436920.

The spelling of 238391136 in words is "two hundred thirty-eight million, three hundred ninety-one thousand, one hundred thirty-six".