238911957 has 16 divisors (see below), whose sum is σ = 354257280. Its totient is φ = 159133536.

The previous prime is 238911941. The next prime is 238911983. The reversal of 238911957 is 759119832.

It is not a de Polignac number, because 238911957 - 2⁴ = 238911941 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (238911457) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33673 + ... + 40145.

It is an arithmetic number, because the mean of its divisors is an integer number (22141080).

Almost surely, 2^238911957 is an apocalyptic number.

238911957 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

238911957 is a deficient number, since it is larger than the sum of its proper divisors (115345323).

238911957 is a wasteful number, since it uses less digits than its factorization.

238911957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7849 (or 7843 counting only the distinct ones).

The product of its digits is 136080, while the sum is 45.

The square root of 238911957 is about 15456.7770573299. Note that the first 3 decimals coincide. The cubic root of 238911957 is about 620.5059666201.

The spelling of 238911957 in words is "two hundred thirty-eight million, nine hundred eleven thousand, nine hundred fifty-seven".