865293056 has 54 divisors (see below), whose sum is σ = 1758786372. Its totient is φ = 424875520.

The previous prime is 865293029. The next prime is 865293061. The reversal of 865293056 is 650392568.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 865292998 and 865293016.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 890651 + ... + 891621.

It is an arithmetic number, because the mean of its divisors is an integer number (32570118).

Almost surely, 2^865293056 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 865293056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (879393186).

865293056 is an abundant number, since it is smaller than the sum of its proper divisors (893493316).

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

865293056 is an frugal number, since it uses more digits than its factorization.

865293056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1105 (or 1032 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 44.

The square root of 865293056 is about 29415.8640192669. The cubic root of 865293056 is about 952.9155328794.

The spelling of 865293056 in words is "eight hundred sixty-five million, two hundred ninety-three thousand, fifty-six".