812197320 has 128 divisors (see below), whose sum is σ = 2665457280. Its totient is φ = 196352000.

The previous prime is 812197307. The next prime is 812197327. The reversal of 812197320 is 23791218.

It is a super-3 number, since 3×812197320³ (a number of 28 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (812197327) 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, 687130 + ... + 688310.

It is an arithmetic number, because the mean of its divisors is an integer number (20823885).

Almost surely, 2^812197320 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 812197320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1332728640).

812197320 is an abundant number, since it is smaller than the sum of its proper divisors (1853259960).

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

812197320 is a wasteful number, since it uses less digits than its factorization.

812197320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1727 (or 1723 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 812197320 is about 28499.0757744878. The cubic root of 812197320 is about 933.0119023535.

The spelling of 812197320 in words is "eight hundred twelve million, one hundred ninety-seven thousand, three hundred twenty".