865802812 has 24 divisors (see below), whose sum is σ = 1778407904. Its totient is φ = 361029312.

The previous prime is 865802803. The next prime is 865802851. The reversal of 865802812 is 218208568.

It is a happy number.

It is a super-2 number, since 2×865802812² = 1499229018534214688, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 416823 + ... + 418894.

Almost surely, 2^865802812 is an apocalyptic number.

It is an amenable number.

865802812 is an abundant number, since it is smaller than the sum of its proper divisors (912605092).

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

865802812 is a wasteful number, since it uses less digits than its factorization.

865802812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 835765 (or 835763 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 40.

The square root of 865802812 is about 29424.5273878783. The cubic root of 865802812 is about 953.1026213461.

The spelling of 865802812 in words is "eight hundred sixty-five million, eight hundred two thousand, eight hundred twelve".