865848816 has 180 divisors, whose sum is σ = 2835356472. Its totient is φ = 245935872.

The previous prime is 865848799. The next prime is 865848821. The reversal of 865848816 is 618848568.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1954291 + ... + 1954733.

Almost surely, 2^865848816 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 865848816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1417678236).

865848816 is an abundant number, since it is smaller than the sum of its proper divisors (1969507656).

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

865848816 is a wasteful number, since it uses less digits than its factorization.

865848816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 748 (or 732 counting only the distinct ones).

The product of its digits is 2949120, while the sum is 54.

The square root of 865848816 is about 29425.3091062779. The cubic root of 865848816 is about 953.1195019244.

The spelling of 865848816 in words is "eight hundred sixty-five million, eight hundred forty-eight thousand, eight hundred sixteen".