816424 has 32 divisors (see below), whose sum is σ = 1785600. Its totient is φ = 342720.

The previous prime is 816401. The next prime is 816427. The reversal of 816424 is 424618.

It is a plaindrome in base 13.

It is a zygodrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (816427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3297 + ... + 3535.

It is an arithmetic number, because the mean of its divisors is an integer number (55800).

2⁸¹⁶⁴²⁴ 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 816424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (892800).

816424 is an abundant number, since it is smaller than the sum of its proper divisors (969176).

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

816424 is a wasteful number, since it uses less digits than its factorization.

816424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313 (or 309 counting only the distinct ones).

The product of its digits is 1536, while the sum is 25.

The square root of 816424 is about 903.5618407171. The cubic root of 816424 is about 93.4627569556.

The spelling of 816424 in words is "eight hundred sixteen thousand, four hundred twenty-four".