865959952 has 160 divisors (see below), whose sum is σ = 2109864960. Its totient is φ = 338688000.

The previous prime is 865959947. The next prime is 865959971. The reversal of 865959952 is 259959568.

It is a Harshad number since it is a multiple of its sum of digits (58).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2056702 + ... + 2057122.

It is an arithmetic number, because the mean of its divisors is an integer number (13186656).

Almost surely, 2^865959952 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 865959952, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1054932480).

865959952 is an abundant number, since it is smaller than the sum of its proper divisors (1243905008).

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

865959952 is a wasteful number, since it uses less digits than its factorization.

865959952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 513 (or 507 counting only the distinct ones).

The product of its digits is 8748000, while the sum is 58.

The square root of 865959952 is about 29427.1974880382. The cubic root of 865959952 is about 953.1602793886.

The spelling of 865959952 in words is "eight hundred sixty-five million, nine hundred fifty-nine thousand, nine hundred fifty-two".