238128984 has 80 divisors (see below), whose sum is σ = 683325720. Its totient is φ = 77431680.

The previous prime is 238128983. The next prime is 238129019. The reversal of 238128984 is 489821832.

238128984 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (238128983) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 22087 + ... + 31049.

Almost surely, 2^238128984 is an apocalyptic number.

238128984 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 238128984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (341662860).

238128984 is an abundant number, since it is smaller than the sum of its proper divisors (445196736).

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

238128984 is a wasteful number, since it uses less digits than its factorization.

238128984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9022 (or 9009 counting only the distinct ones).

The product of its digits is 221184, while the sum is 45.

The square root of 238128984 is about 15431.4284497580. The cubic root of 238128984 is about 619.8273747642.

The spelling of 238128984 in words is "two hundred thirty-eight million, one hundred twenty-eight thousand, nine hundred eighty-four".