238141640 has 32 divisors (see below), whose sum is σ = 584530560. Its totient is φ = 86596800.

The previous prime is 238141619. The next prime is 238141643. The reversal of 238141640 is 46141832.

It is a super-2 number, since 2×238141640² = 113422881403779200, which contains 22 as substring.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (238141643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 270176 + ... + 271055.

It is an arithmetic number, because the mean of its divisors is an integer number (18266580).

Almost surely, 2^238141640 is an apocalyptic number.

238141640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

238141640 is an abundant number, since it is smaller than the sum of its proper divisors (346388920).

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

238141640 is a wasteful number, since it uses less digits than its factorization.

238141640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 541253 (or 541249 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 238141640 is about 15431.8385165216. The cubic root of 238141640 is about 619.8383553627.

The spelling of 238141640 in words is "two hundred thirty-eight million, one hundred forty-one thousand, six hundred forty".