238187733840 has 640 divisors, whose sum is σ = 982734720000. Its totient is φ = 52965384192.

The previous prime is 238187733743. The next prime is 238187733863. The reversal of 238187733840 is 48337781832.

It is a happy number.

238187733840 is a `hidden beast` number, since 238 + 1 + 8 + 77 + 338 + 4 + 0 = 666.

It is a super-2 number, since 2×238187733840² (a number of 24 digits) contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 27408216 + ... + 27416904.

It is an arithmetic number, because the mean of its divisors is an integer number (1535523000).

Almost surely, 2^238187733840 is an apocalyptic number.

238187733840 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 238187733840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (491367360000).

238187733840 is an abundant number, since it is smaller than the sum of its proper divisors (744546986160).

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

238187733840 is a wasteful number, since it uses less digits than its factorization.

238187733840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8769 (or 8743 counting only the distinct ones).

The product of its (nonzero) digits is 5419008, while the sum is 54.

The spelling of 238187733840 in words is "two hundred thirty-eight billion, one hundred eighty-seven million, seven hundred thirty-three thousand, eight hundred forty".