865030812 has 12 divisors (see below), whose sum is σ = 2018405256. Its totient is φ = 288343600.

The previous prime is 865030753. The next prime is 865030819. The reversal of 865030812 is 218030568.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (865030819) 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, 36042939 + ... + 36042962.

It is an arithmetic number, because the mean of its divisors is an integer number (168200438).

Almost surely, 2^865030812 is an apocalyptic number.

It is an amenable number.

865030812 is an abundant number, since it is smaller than the sum of its proper divisors (1153374444).

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

865030812 is a wasteful number, since it uses less digits than its factorization.

865030812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72085908 (or 72085906 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 865030812 is about 29411.4061547557. The cubic root of 865030812 is about 952.8192565836.

The spelling of 865030812 in words is "eight hundred sixty-five million, thirty thousand, eight hundred twelve".