865667238 has 24 divisors (see below), whose sum is σ = 1809889368. Its totient is φ = 276008832.

The previous prime is 865667233. The next prime is 865667249. The reversal of 865667238 is 832766568.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (865667233) 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 11 ways as a sum of consecutive naturals, for example, 133195 + ... + 139542.

It is an arithmetic number, because the mean of its divisors is an integer number (75412057).

Almost surely, 2^865667238 is an apocalyptic number.

865667238 is an abundant number, since it is smaller than the sum of its proper divisors (944222130).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

865667238 is a wasteful number, since it uses less digits than its factorization.

865667238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272788 (or 272765 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 51.

The square root of 865667238 is about 29422.2235393588. The cubic root of 865667238 is about 953.0528707262.

The spelling of 865667238 in words is "eight hundred sixty-five million, six hundred sixty-seven thousand, two hundred thirty-eight".