812392 has 32 divisors (see below), whose sum is σ = 1771200. Its totient is φ = 342144.

The previous prime is 812387. The next prime is 812393. The reversal of 812392 is 293218.

It is an Ulam number.

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

812392 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4903 + ... + 5065.

It is an arithmetic number, because the mean of its divisors is an integer number (55350).

2⁸¹²³⁹² 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 812392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (885600).

812392 is an abundant number, since it is smaller than the sum of its proper divisors (958808).

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

812392 is a wasteful number, since it uses less digits than its factorization.

812392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265 (or 261 counting only the distinct ones).

The product of its digits is 864, while the sum is 25.

The square root of 812392 is about 901.3279092539. The cubic root of 812392 is about 93.3086442633.

The spelling of 812392 in words is "eight hundred twelve thousand, three hundred ninety-two".