238153728 has 52 divisors (see below), whose sum is σ = 635031848. Its totient is φ = 79380480.

The previous prime is 238153723. The next prime is 238153757. The reversal of 238153728 is 827351832.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (238153723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2598 + ... + 21978.

Almost surely, 2^238153728 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 238153728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (317515924).

238153728 is an abundant number, since it is smaller than the sum of its proper divisors (396878120).

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

238153728 is an equidigital number, since it uses as much as digits as its factorization.

238153728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19408 (or 19386 counting only the distinct ones).

The product of its digits is 80640, while the sum is 39.

The square root of 238153728 is about 15432.2301693566. The cubic root of 238153728 is about 619.8488427898.

The spelling of 238153728 in words is "two hundred thirty-eight million, one hundred fifty-three thousand, seven hundred twenty-eight".