238385820 has 96 divisors (see below), whose sum is σ = 690697728. Its totient is φ = 61385472.

The previous prime is 238385803. The next prime is 238385863. The reversal of 238385820 is 28583832.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 370419 + ... + 371061.

It is an arithmetic number, because the mean of its divisors is an integer number (7194768).

Almost surely, 2^238385820 is an apocalyptic number.

238385820 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 238385820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (345348864).

238385820 is an abundant number, since it is smaller than the sum of its proper divisors (452311908).

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

238385820 is a wasteful number, since it uses less digits than its factorization.

238385820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 859 (or 857 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 39.

The square root of 238385820 is about 15439.7480549392. The cubic root of 238385820 is about 620.0501346902.

The spelling of 238385820 in words is "two hundred thirty-eight million, three hundred eighty-five thousand, eight hundred twenty".