865489812 has 24 divisors (see below), whose sum is σ = 2203065312. Its totient is φ = 262269600.

The previous prime is 865489811. The next prime is 865489813. The reversal of 865489812 is 218984568.

865489812 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (865489811) and next prime (865489813).

It is a super-2 number, since 2×865489812² = 1498145229351590688, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (865489811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3278239 + ... + 3278502.

It is an arithmetic number, because the mean of its divisors is an integer number (91794388).

Almost surely, 2^865489812 is an apocalyptic number.

It is an amenable number.

865489812 is an abundant number, since it is smaller than the sum of its proper divisors (1337575500).

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

865489812 is a wasteful number, since it uses less digits than its factorization.

865489812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6556759 (or 6556757 counting only the distinct ones).

The product of its digits is 1105920, while the sum is 51.

The square root of 865489812 is about 29419.2082150421. The cubic root of 865489812 is about 952.9877541297.

The spelling of 865489812 in words is "eight hundred sixty-five million, four hundred eighty-nine thousand, eight hundred twelve".