238732388640 has 480 divisors, whose sum is σ = 910874099520. Its totient is φ = 58679064576.

The previous prime is 238732388617. The next prime is 238732388651. The reversal of 238732388640 is 46883237832.

238732388640 is a `hidden beast` number, since 238 + 7 + 323 + 8 + 86 + 4 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (480).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 9097779 + ... + 9123981.

It is an arithmetic number, because the mean of its divisors is an integer number (1897654374).

Almost surely, 2^238732388640 is an apocalyptic number.

238732388640 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 238732388640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (455437049760).

238732388640 is an abundant number, since it is smaller than the sum of its proper divisors (672141710880).

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

238732388640 is a wasteful number, since it uses less digits than its factorization.

238732388640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26286 (or 26269 counting only the distinct ones).

The product of its (nonzero) digits is 9289728, while the sum is 54.

The spelling of 238732388640 in words is "two hundred thirty-eight billion, seven hundred thirty-two million, three hundred eighty-eight thousand, six hundred forty".