238830721 has 4 divisors (see below), whose sum is σ = 238865344. Its totient is φ = 238796100.

The previous prime is 238830701. The next prime is 238830743. The reversal of 238830721 is 127038832.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 238830721 - 2¹⁵ = 238797953 is a prime.

It is a super-2 number, since 2×238830721² = 114080226586759682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (238830701) 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 3 ways as a sum of consecutive naturals, for example, 3045 + ... + 22066.

It is an arithmetic number, because the mean of its divisors is an integer number (59716336).

Almost surely, 2^238830721 is an apocalyptic number.

It is an amenable number.

238830721 is a deficient number, since it is larger than the sum of its proper divisors (34623).

238830721 is an equidigital number, since it uses as much as digits as its factorization.

238830721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34622.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 238830721 is about 15454.1489898344. The cubic root of 238830721 is about 620.4356295000.

The spelling of 238830721 in words is "two hundred thirty-eight million, eight hundred thirty thousand, seven hundred twenty-one".