865867240 has 96 divisors (see below), whose sum is σ = 2385655200. Its totient is φ = 281232000.

The previous prime is 865867217. The next prime is 865867267. The reversal of 865867240 is 42768568.

865867240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25615 + ... + 48865.

It is an arithmetic number, because the mean of its divisors is an integer number (24850575).

Almost surely, 2^865867240 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 865867240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1192827600).

865867240 is an abundant number, since it is smaller than the sum of its proper divisors (1519787960).

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

865867240 is a wasteful number, since it uses less digits than its factorization.

865867240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23295 (or 23284 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 46.

The square root of 865867240 is about 29425.6221684436. The cubic root of 865867240 is about 953.1262622074.

The spelling of 865867240 in words is "eight hundred sixty-five million, eight hundred sixty-seven thousand, two hundred forty".