238629889 has 4 divisors (see below), whose sum is σ = 239099220. Its totient is φ = 238160560.

The previous prime is 238629883. The next prime is 238629913. The reversal of 238629889 is 988926832.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 140778225 + 97851664 = 11865^2 + 9892^2 .

It is a cyclic number.

It is not a de Polignac number, because 238629889 - 2¹⁹ = 238105601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (238629883) 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, 233902 + ... + 234919.

It is an arithmetic number, because the mean of its divisors is an integer number (59774805).

Almost surely, 2^238629889 is an apocalyptic number.

It is an amenable number.

238629889 is a deficient number, since it is larger than the sum of its proper divisors (469331).

238629889 is an equidigital number, since it uses as much as digits as its factorization.

238629889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 469330.

The product of its digits is 2985984, while the sum is 55.

The square root of 238629889 is about 15447.6499507207. The cubic root of 238629889 is about 620.2616732765.

The spelling of 238629889 in words is "two hundred thirty-eight million, six hundred twenty-nine thousand, eight hundred eighty-nine".