812305530 has 64 divisors (see below), whose sum is σ = 2219011200. Its totient is φ = 211328640.

The previous prime is 812305519. The next prime is 812305531. The reversal of 812305530 is 35503218.

812305530 is a `hidden beast` number, since 8 + 123 + 0 + 5 + 530 = 666.

812305530 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 812305494 and 812305503.

It is not an unprimeable number, because it can be changed into a prime (812305531) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25620 + ... + 47759.

It is an arithmetic number, because the mean of its divisors is an integer number (34672050).

Almost surely, 2^812305530 is an apocalyptic number.

812305530 is an abundant number, since it is smaller than the sum of its proper divisors (1406705670).

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

812305530 is a wasteful number, since it uses less digits than its factorization.

812305530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73436 (or 73430 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 812305530 is about 28500.9741938763. The cubic root of 812305530 is about 933.0533359363.

Adding to 812305530 its reverse (35503218), we get a palindrome (847808748).

The spelling of 812305530 in words is "eight hundred twelve million, three hundred five thousand, five hundred thirty".