812305670 has 96 divisors (see below), whose sum is σ = 1715061600. Its totient is φ = 275996160.

The previous prime is 812305667. The next prime is 812305673. The reversal of 812305670 is 76503218.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (812305667) and next prime (812305673).

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (812305673) 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 47 ways as a sum of consecutive naturals, for example, 2045912 + ... + 2046308.

It is an arithmetic number, because the mean of its divisors is an integer number (17865225).

Almost surely, 2^812305670 is an apocalyptic number.

812305670 is an abundant number, since it is smaller than the sum of its proper divisors (902755930).

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

812305670 is a wasteful number, since it uses less digits than its factorization.

812305670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 534 (or 523 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 812305670 is about 28500.9766499325. The cubic root of 812305670 is about 933.0533895398.

Adding to 812305670 its reverse (76503218), we get a palindrome (888808888).

The spelling of 812305670 in words is "eight hundred twelve million, three hundred five thousand, six hundred seventy".