865381336 has 16 divisors (see below), whose sum is σ = 1623196800. Its totient is φ = 432528864.

The previous prime is 865381333. The next prime is 865381351. The reversal of 865381336 is 633183568.

It is a super-3 number, since 3×865381336³ (a number of 28 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 865381292 and 865381301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (865381333) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4246 + ... + 41818.

It is an arithmetic number, because the mean of its divisors is an integer number (101449800).

Almost surely, 2^865381336 is an apocalyptic number.

It is an amenable number.

865381336 is a deficient number, since it is larger than the sum of its proper divisors (757815464).

865381336 is a wasteful number, since it uses less digits than its factorization.

865381336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40458 (or 40454 counting only the distinct ones).

The product of its digits is 311040, while the sum is 43.

The square root of 865381336 is about 29417.3645318543. The cubic root of 865381336 is about 952.9479382870.

The spelling of 865381336 in words is "eight hundred sixty-five million, three hundred eighty-one thousand, three hundred thirty-six".