812818734 has 64 divisors (see below), whose sum is σ = 2013279744. Its totient is φ = 213031296.

The previous prime is 812818709. The next prime is 812818789. The reversal of 812818734 is 437818218.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 84432 + ... + 93564.

It is an arithmetic number, because the mean of its divisors is an integer number (31457496).

Almost surely, 2^812818734 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 812818734, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1006639872).

812818734 is an abundant number, since it is smaller than the sum of its proper divisors (1200461010).

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

812818734 is a wasteful number, since it uses less digits than its factorization.

812818734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9321.

The product of its digits is 86016, while the sum is 42.

The square root of 812818734 is about 28509.9760434834. The cubic root of 812818734 is about 933.2497915304.

It can be divided in two parts, 8128 and 18734, that added together give a palindrome (26862).

The spelling of 812818734 in words is "eight hundred twelve million, eight hundred eighteen thousand, seven hundred thirty-four".