238688240 has 40 divisors (see below), whose sum is σ = 634230240. Its totient is φ = 81835776.

The previous prime is 238688209. The next prime is 238688249. The reversal of 238688240 is 42886832.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (238688249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 212555 + ... + 213674.

It is an arithmetic number, because the mean of its divisors is an integer number (15855756).

Almost surely, 2^238688240 is an apocalyptic number.

238688240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

238688240 is an abundant number, since it is smaller than the sum of its proper divisors (395542000).

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

238688240 is a wasteful number, since it uses less digits than its factorization.

238688240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426249 (or 426243 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 41.

The square root of 238688240 is about 15449.5385044344. The cubic root of 238688240 is about 620.3122256744.

The spelling of 238688240 in words is "two hundred thirty-eight million, six hundred eighty-eight thousand, two hundred forty".