816530 has 32 divisors (see below), whose sum is σ = 1729728. Its totient is φ = 273600.

The previous prime is 816521. The next prime is 816539. The reversal of 816530 is 35618.

816530 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (816521) and next prime (816539).

It is a junction number, because it is equal to n+sod(n) for n = 816496 and 816505.

It is not an unprimeable number, because it can be changed into a prime (816539) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1145 + ... + 1715.

It is an arithmetic number, because the mean of its divisors is an integer number (54054).

2⁸¹⁶⁵³⁰ is an apocalyptic number.

816530 is an abundant number, since it is smaller than the sum of its proper divisors (913198).

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

816530 is a wasteful number, since it uses less digits than its factorization.

816530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 602.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 816530 is about 903.6204955622. The cubic root of 816530 is about 93.4668016773.

The spelling of 816530 in words is "eight hundred sixteen thousand, five hundred thirty".