238946721 has 8 divisors (see below), whose sum is σ = 343103040. Its totient is φ = 147044112.

The previous prime is 238946711. The next prime is 238946761. The reversal of 238946721 is 127649832.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 238946721 - 2¹⁸ = 238684577 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (238946711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3063381 + ... + 3063458.

It is an arithmetic number, because the mean of its divisors is an integer number (42887880).

Almost surely, 2^238946721 is an apocalyptic number.

It is an amenable number.

238946721 is a deficient number, since it is larger than the sum of its proper divisors (104156319).

238946721 is a wasteful number, since it uses less digits than its factorization.

238946721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6126855.

The product of its digits is 145152, while the sum is 42.

The square root of 238946721 is about 15457.9015716882. The cubic root of 238946721 is about 620.5360616999.

The spelling of 238946721 in words is "two hundred thirty-eight million, nine hundred forty-six thousand, seven hundred twenty-one".