812680530 has 32 divisors (see below), whose sum is σ = 1977156864. Its totient is φ = 213745536.

The previous prime is 812680507. The next prime is 812680553. The reversal of 812680530 is 35086218.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (812680507) and next prime (812680553).

It is a junction number, because it is equal to n+sod(n) for n = 812680491 and 812680500.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 183354 + ... + 187733.

It is an arithmetic number, because the mean of its divisors is an integer number (61786152).

Almost surely, 2^812680530 is an apocalyptic number.

812680530 is an abundant number, since it is smaller than the sum of its proper divisors (1164476334).

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

812680530 is a wasteful number, since it uses less digits than its factorization.

812680530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 371170.

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 812680530 is about 28507.5521572793. The cubic root of 812680530 is about 933.1968948801.

The spelling of 812680530 in words is "eight hundred twelve million, six hundred eighty thousand, five hundred thirty".