816280 has 16 divisors (see below), whose sum is σ = 1836720. Its totient is φ = 326496.

The previous prime is 816271. The next prime is 816317. The reversal of 816280 is 82618.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10164 + ... + 10243.

It is an arithmetic number, because the mean of its divisors is an integer number (114795).

2⁸¹⁶²⁸⁰ is an apocalyptic number.

It is an amenable number.

816280 is an abundant number, since it is smaller than the sum of its proper divisors (1020440).

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

816280 is a wasteful number, since it uses less digits than its factorization.

816280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20418 (or 20414 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 816280 is about 903.4821525631. The cubic root of 816280 is about 93.4572616785.

Adding to 816280 its reverse (82618), we get a palindrome (898898).

The spelling of 816280 in words is "eight hundred sixteen thousand, two hundred eighty".