812744 has 16 divisors (see below), whose sum is σ = 1604400. Its totient is φ = 384912.

The previous prime is 812731. The next prime is 812759. The reversal of 812744 is 447218.

It is a plaindrome in base 9.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 812744.

It is an unprimeable number.

812744 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 3 ways as a sum of consecutive naturals, for example, 2522 + ... + 2825.

It is an arithmetic number, because the mean of its divisors is an integer number (100275).

2⁸¹²⁷⁴⁴ is an apocalyptic number.

It is an amenable number.

812744 is a deficient number, since it is larger than the sum of its proper divisors (791656).

812744 is a wasteful number, since it uses less digits than its factorization.

812744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5372 (or 5368 counting only the distinct ones).

The product of its digits is 1792, while the sum is 26.

The square root of 812744 is about 901.5231555540. The cubic root of 812744 is about 93.3221188340.

The spelling of 812744 in words is "eight hundred twelve thousand, seven hundred forty-four".