238265397641988 has 144 divisors (see below), whose sum is σ = 621898188527616. Its totient is φ = 76870159349760.

The previous prime is 238265397641969. The next prime is 238265397642023. The reversal of 238265397641988 is 889146793562832.

238265397641988 is a `hidden beast` number, since 2 + 3 + 8 + 2 + 6 + 53 + 9 + 76 + 419 + 88 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 160667220 + ... + 162143412.

Almost surely, 2^{238265397641988} 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 238265397641988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (310949094263808).

238265397641988 is an abundant number, since it is smaller than the sum of its proper divisors (383632790885628).

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

238265397641988 is a wasteful number, since it uses less digits than its factorization.

238265397641988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1477194 (or 1477189 counting only the distinct ones).

The product of its digits is 7524679680, while the sum is 81.

The spelling of 238265397641988 in words is "two hundred thirty-eight trillion, two hundred sixty-five billion, three hundred ninety-seven million, six hundred forty-one thousand, nine hundred eighty-eight".