812436 has 24 divisors (see below), whose sum is σ = 1921920. Its totient is φ = 267072.

The previous prime is 812431. The next prime is 812443. The reversal of 812436 is 634218.

It is a happy number.

It is an Ulam number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 812436.

It is not an unprimeable number, because it can be changed into a prime (812431) by changing a digit.

812436 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, 520 + ... + 1376.

It is an arithmetic number, because the mean of its divisors is an integer number (80080).

2⁸¹²⁴³⁶ is an apocalyptic number.

It is an amenable number.

812436 is an abundant number, since it is smaller than the sum of its proper divisors (1109484).

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

812436 is a wasteful number, since it uses less digits than its factorization.

812436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 943 (or 941 counting only the distinct ones).

The product of its digits is 1152, while the sum is 24.

The square root of 812436 is about 901.3523173543. The cubic root of 812436 is about 93.3103287975.

The spelling of 812436 in words is "eight hundred twelve thousand, four hundred thirty-six".