816320 has 28 divisors (see below), whose sum is σ = 1944624. Its totient is φ = 326400.

The previous prime is 816317. The next prime is 816329. The reversal of 816320 is 23618.

It is a hoax number, since the sum of its digits (20) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 816292 and 816301.

It is not an unprimeable number, because it can be changed into a prime (816329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 956 + ... + 1595.

2⁸¹⁶³²⁰ is an apocalyptic number.

816320 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

816320 is an abundant number, since it is smaller than the sum of its proper divisors (1128304).

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

816320 is a wasteful number, since it uses less digits than its factorization.

816320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2568 (or 2558 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 816320 is about 903.5042888664. The cubic root of 816320 is about 93.4587882092.

Adding to 816320 its reverse (23618), we get a palindrome (839938).

The spelling of 816320 in words is "eight hundred sixteen thousand, three hundred twenty".