238218783860 has 24 divisors (see below), whose sum is σ = 500395651560. Its totient is φ = 95261569664.

The previous prime is 238218783853. The next prime is 238218783871. The reversal of 238218783860 is 68387812832.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 35252315536 + 202966468324 = 187756^2 + 450518^2 .

It is a junction number, because it is equal to n+sod(n) for n = 238218783796 and 238218783805.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1546115 + ... + 1693194.

It is an arithmetic number, because the mean of its divisors is an integer number (20849818815).

Almost surely, 2^238218783860 is an apocalyptic number.

238218783860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

238218783860 is an abundant number, since it is smaller than the sum of its proper divisors (262176867700).

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

238218783860 is a wasteful number, since it uses less digits than its factorization.

238218783860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3242995 (or 3242993 counting only the distinct ones).

The product of its (nonzero) digits is 6193152, while the sum is 56.

The spelling of 238218783860 in words is "two hundred thirty-eight billion, two hundred eighteen million, seven hundred eighty-three thousand, eight hundred sixty".