238658238 has 80 divisors (see below), whose sum is σ = 658220640. Its totient is φ = 62938944.

The previous prime is 238658219. The next prime is 238658239. The reversal of 238658238 is 832856832.

238658238 is a `hidden beast` number, since 2 + 38 + 6 + 582 + 38 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 238658193 and 238658202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (238658239) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 6648 + ... + 22836.

It is an arithmetic number, because the mean of its divisors is an integer number (8227758).

Almost surely, 2^238658238 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 238658238, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (329110320).

238658238 is an abundant number, since it is smaller than the sum of its proper divisors (419562402).

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

238658238 is a wasteful number, since it uses less digits than its factorization.

238658238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16223 (or 16214 counting only the distinct ones).

The product of its digits is 552960, while the sum is 45.

The square root of 238658238 is about 15448.5675064065. The cubic root of 238658238 is about 620.2862344662.

The spelling of 238658238 in words is "two hundred thirty-eight million, six hundred fifty-eight thousand, two hundred thirty-eight".