238427658 has 64 divisors (see below), whose sum is σ = 607104000. Its totient is φ = 67945392.

The previous prime is 238427653. The next prime is 238427659. The reversal of 238427658 is 856724832.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (238427653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 233473 + ... + 234491.

It is an arithmetic number, because the mean of its divisors is an integer number (9486000).

Almost surely, 2^238427658 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 238427658, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (303552000).

238427658 is an abundant number, since it is smaller than the sum of its proper divisors (368676342).

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

238427658 is a wasteful number, since it uses less digits than its factorization.

238427658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1656 (or 1650 counting only the distinct ones).

The product of its digits is 645120, while the sum is 45.

The square root of 238427658 is about 15441.1028751187. The cubic root of 238427658 is about 620.0864066185.

The spelling of 238427658 in words is "two hundred thirty-eight million, four hundred twenty-seven thousand, six hundred fifty-eight".