864440832 has 80 divisors (see below), whose sum is σ = 2403149760. Its totient is φ = 275607552.

The previous prime is 864440813. The next prime is 864440849. The reversal of 864440832 is 238044468.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23094 + ... + 47562.

It is an arithmetic number, because the mean of its divisors is an integer number (30039372).

Almost surely, 2^864440832 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 864440832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1201574880).

864440832 is an abundant number, since it is smaller than the sum of its proper divisors (1538708928).

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

864440832 is a wasteful number, since it uses less digits than its factorization.

864440832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24513 (or 24497 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 39.

The square root of 864440832 is about 29401.3746617399. The cubic root of 864440832 is about 952.6025890977.

The spelling of 864440832 in words is "eight hundred sixty-four million, four hundred forty thousand, eight hundred thirty-two".