812205234 has 24 divisors (see below), whose sum is σ = 1760316012. Its totient is φ = 270652320.

The previous prime is 812205211. The next prime is 812205253. The reversal of 812205234 is 432502218.

It can be written as a sum of positive squares in 2 ways, for example, as 590344209 + 221861025 = 24297^2 + 14895^2 .

It is a junction number, because it is equal to n+sod(n) for n = 812205198 and 812205207.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 91764 + ... + 100224.

Almost surely, 2^812205234 is an apocalyptic number.

812205234 is an abundant number, since it is smaller than the sum of its proper divisors (948110778).

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

812205234 is a wasteful number, since it uses less digits than its factorization.

812205234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13802 (or 13799 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 812205234 is about 28499.2146207575. The cubic root of 812205234 is about 933.0149327469.

The spelling of 812205234 in words is "eight hundred twelve million, two hundred five thousand, two hundred thirty-four".