238238820 has 120 divisors (see below), whose sum is σ = 752136000. Its totient is φ = 63125568.

The previous prime is 238238789. The next prime is 238238837. The reversal of 238238820 is 28832832.

238238820 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 322011 + ... + 322749.

It is an arithmetic number, because the mean of its divisors is an integer number (6267800).

Almost surely, 2^238238820 is an apocalyptic number.

238238820 is a gapful number since it is divisible by the number (20) 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 238238820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (376068000).

238238820 is an abundant number, since it is smaller than the sum of its proper divisors (513897180).

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

238238820 is a wasteful number, since it uses less digits than its factorization.

238238820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 959 (or 948 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 36.

The square root of 238238820 is about 15434.9868804609. The cubic root of 238238820 is about 619.9226577127.

The spelling of 238238820 in words is "two hundred thirty-eight million, two hundred thirty-eight thousand, eight hundred twenty".