238481791 has 16 divisors (see below), whose sum is σ = 250069248. Its totient is φ = 227174400.

The previous prime is 238481777. The next prime is 238481809. The reversal of 238481791 is 197184832.

It is a cyclic number.

It is not a de Polignac number, because 238481791 - 2⁵ = 238481759 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (238481731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 989431 + ... + 989671.

It is an arithmetic number, because the mean of its divisors is an integer number (15629328).

Almost surely, 2^238481791 is an apocalyptic number.

238481791 is a deficient number, since it is larger than the sum of its proper divisors (11587457).

238481791 is a wasteful number, since it uses less digits than its factorization.

238481791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 642.

The product of its digits is 96768, while the sum is 43.

The square root of 238481791 is about 15442.8556620853. The cubic root of 238481791 is about 620.1333315399.

The spelling of 238481791 in words is "two hundred thirty-eight million, four hundred eighty-one thousand, seven hundred ninety-one".