238684428 has 48 divisors (see below), whose sum is σ = 626290560. Its totient is φ = 78599952.

The previous prime is 238684427. The next prime is 238684477. The reversal of 238684428 is 824486832.

It is not an unprimeable number, because it can be changed into a prime (238684421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4350 + ... + 22277.

It is an arithmetic number, because the mean of its divisors is an integer number (13047720).

Almost surely, 2^238684428 is an apocalyptic number.

It is an amenable number.

238684428 is an abundant number, since it is smaller than the sum of its proper divisors (387606132).

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

238684428 is a wasteful number, since it uses less digits than its factorization.

238684428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26723 (or 26715 counting only the distinct ones).

The product of its digits is 589824, while the sum is 45.

The square root of 238684428 is about 15449.4151345609. The cubic root of 238684428 is about 620.3089233991.

The spelling of 238684428 in words is "two hundred thirty-eight million, six hundred eighty-four thousand, four hundred twenty-eight".