238133866 has 16 divisors (see below), whose sum is σ = 365316480. Its totient is φ = 116368960.

The previous prime is 238133851. The next prime is 238133867. The reversal of 238133866 is 668331832.

It is a super-2 number, since 2×238133866² = 113415476272211912, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (238133867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89970 + ... + 92578.

It is an arithmetic number, because the mean of its divisors is an integer number (22832280).

Almost surely, 2^238133866 is an apocalyptic number.

238133866 is a deficient number, since it is larger than the sum of its proper divisors (127182614).

238133866 is a wasteful number, since it uses less digits than its factorization.

238133866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3629.

The product of its digits is 124416, while the sum is 40.

The square root of 238133866 is about 15431.5866326182. The cubic root of 238133866 is about 619.8316105311.

The spelling of 238133866 in words is "two hundred thirty-eight million, one hundred thirty-three thousand, eight hundred sixty-six".