238116905 has 8 divisors (see below), whose sum is σ = 307720392. Its totient is φ = 175840128.

The previous prime is 238116887. The next prime is 238116961. The reversal of 238116905 is 509611832.

It can be written as a sum of positive squares in 4 ways, for example, as 11343424 + 226773481 = 3368^2 + 15059^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 238116905 - 2⁸ = 238116649 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 1831604 + ... + 1831733.

It is an arithmetic number, because the mean of its divisors is an integer number (38465049).

Almost surely, 2^238116905 is an apocalyptic number.

It is an amenable number.

238116905 is a deficient number, since it is larger than the sum of its proper divisors (69603487).

238116905 is a wasteful number, since it uses less digits than its factorization.

238116905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3663355.

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 238116905 is about 15431.0370681947. The cubic root of 238116905 is about 619.8168944196.

The spelling of 238116905 in words is "two hundred thirty-eight million, one hundred sixteen thousand, nine hundred five".