864043576 has 72 divisors (see below), whose sum is σ = 1867655160. Its totient is φ = 373764160.

The previous prime is 864043571. The next prime is 864043597. The reversal of 864043576 is 675340468.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (864043571) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 4385910 + ... + 4386106.

It is an arithmetic number, because the mean of its divisors is an integer number (25939655).

Almost surely, 2^864043576 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 864043576, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (933827580).

864043576 is an abundant number, since it is smaller than the sum of its proper divisors (1003611584).

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

864043576 is a wasteful number, since it uses less digits than its factorization.

864043576 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 445 (or 233 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 43.

The square root of 864043576 is about 29394.6181468649. The cubic root of 864043576 is about 952.4566430849.

The spelling of 864043576 in words is "eight hundred sixty-four million, forty-three thousand, five hundred seventy-six".