238860421128 has 576 divisors, whose sum is σ = 826201958400. Its totient is φ = 64283103360.

The previous prime is 238860421091. The next prime is 238860421157. The reversal of 238860421128 is 821124068832.

238860421128 is a `hidden beast` number, since 2 + 3 + 8 + 8 + 604 + 2 + 11 + 28 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 490472901 + ... + 490473387.

It is an arithmetic number, because the mean of its divisors is an integer number (1434378400).

Almost surely, 2^238860421128 is an apocalyptic number.

238860421128 is a gapful number since it is divisible by the number (28) 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 238860421128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (413100979200).

238860421128 is an abundant number, since it is smaller than the sum of its proper divisors (587341537272).

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

238860421128 is a wasteful number, since it uses less digits than its factorization.

238860421128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 812 (or 789 counting only the distinct ones).

The product of its (nonzero) digits is 294912, while the sum is 45.

The spelling of 238860421128 in words is "two hundred thirty-eight billion, eight hundred sixty million, four hundred twenty-one thousand, one hundred twenty-eight".