816530288 has 20 divisors (see below), whose sum is σ = 1808031600. Its totient is φ = 349941504.

The previous prime is 816530287. The next prime is 816530303. The reversal of 816530288 is 882035618.

It is a super-2 number, since 2×816530288² = 1333443422442725888, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816530287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3645113 + ... + 3645336.

It is an arithmetic number, because the mean of its divisors is an integer number (90401580).

Almost surely, 2^816530288 is an apocalyptic number.

It is an amenable number.

816530288 is an abundant number, since it is smaller than the sum of its proper divisors (991501312).

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

816530288 is a wasteful number, since it uses less digits than its factorization.

816530288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7290464 (or 7290458 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 41.

The square root of 816530288 is about 28574.9941032365. The cubic root of 816530288 is about 934.6681266623.

The spelling of 816530288 in words is "eight hundred sixteen million, five hundred thirty thousand, two hundred eighty-eight".