812394 has 36 divisors (see below), whose sum is σ = 1939938. Its totient is φ = 245520.

The previous prime is 812393. The next prime is 812401. The reversal of 812394 is 493218.

812394 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 680625 + 131769 = 825^2 + 363^2 .

It is a super-2 number, since 2×812394² = 1319968022472, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (812393) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1992 + ... + 2364.

2⁸¹²³⁹⁴ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 812394, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (969969).

812394 is an abundant number, since it is smaller than the sum of its proper divisors (1127544).

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

812394 is a wasteful number, since it uses less digits than its factorization.

812394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403 (or 389 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 812394 is about 901.3290187273. The cubic root of 812394 is about 93.3087208344.

The spelling of 812394 in words is "eight hundred twelve thousand, three hundred ninety-four".