864424 has 48 divisors (see below), whose sum is σ = 1915200. Its totient is φ = 364320.

The previous prime is 864419. The next prime is 864427. The reversal of 864424 is 424468.

It is a junction number, because it is equal to n+sod(n) for n = 864392 and 864401.

It is not an unprimeable number, because it can be changed into a prime (864427) by changing a digit.

864424 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18369 + ... + 18415.

It is an arithmetic number, because the mean of its divisors is an integer number (39900).

2⁸⁶⁴⁴²⁴ 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 864424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (957600).

864424 is an abundant number, since it is smaller than the sum of its proper divisors (1050776).

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

864424 is a wasteful number, since it uses less digits than its factorization.

864424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94 (or 79 counting only the distinct ones).

The product of its digits is 6144, while the sum is 28.

The square root of 864424 is about 929.7440508011. The cubic root of 864424 is about 95.2596406176.

It can be divided in two parts, 8644 and 24, that added together give a palindrome (8668).

The spelling of 864424 in words is "eight hundred sixty-four thousand, four hundred twenty-four".