238256128 has 64 divisors (see below), whose sum is σ = 520610040. Its totient is φ = 108134400.

The previous prime is 238256107. The next prime is 238256129. The reversal of 238256128 is 821652832.

It is a tau number, because it is divible by the number of its divisors (64).

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 (238256129) 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, 360118 + ... + 360778.

Almost surely, 2^238256128 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 238256128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (260305020).

238256128 is an abundant number, since it is smaller than the sum of its proper divisors (282353912).

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

238256128 is an frugal number, since it uses more digits than its factorization.

238256128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 702 (or 674 counting only the distinct ones).

The product of its digits is 46080, while the sum is 37.

The square root of 238256128 is about 15435.5475445479. The cubic root of 238256128 is about 619.9376697659.

The spelling of 238256128 in words is "two hundred thirty-eight million, two hundred fifty-six thousand, one hundred twenty-eight".