865021396 has 24 divisors (see below), whose sum is σ = 1616509440. Its totient is φ = 404124000.

The previous prime is 865021393. The next prime is 865021429. The reversal of 865021396 is 693120568.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (865021393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 116680 + ... + 123871.

It is an arithmetic number, because the mean of its divisors is an integer number (67354560).

Almost surely, 2^865021396 is an apocalyptic number.

It is an amenable number.

865021396 is a deficient number, since it is larger than the sum of its proper divisors (751488044).

865021396 is a wasteful number, since it uses less digits than its factorization.

865021396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240615 (or 240613 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 865021396 is about 29411.2460803686. The cubic root of 865021396 is about 952.8157993739.

The spelling of 865021396 in words is "eight hundred sixty-five million, twenty-one thousand, three hundred ninety-six".