865787832 has 256 divisors, whose sum is σ = 3135283200. Its totient is φ = 214824960.

The previous prime is 865787743. The next prime is 865787833. The reversal of 865787832 is 238787568.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (865787833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 332857 + ... + 335447.

It is an arithmetic number, because the mean of its divisors is an integer number (12247200).

Almost surely, 2^865787832 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 865787832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1567641600).

865787832 is an abundant number, since it is smaller than the sum of its proper divisors (2269495368).

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

865787832 is a wasteful number, since it uses less digits than its factorization.

865787832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2643 (or 2633 counting only the distinct ones).

The product of its digits is 4515840, while the sum is 54.

The square root of 865787832 is about 29424.2728372342. The cubic root of 865787832 is about 953.0971244980.

The spelling of 865787832 in words is "eight hundred sixty-five million, seven hundred eighty-seven thousand, eight hundred thirty-two".