840433 has 4 divisors (see below), whose sum is σ = 916848. Its totient is φ = 764020.

The previous prime is 840353. The next prime is 840439. The reversal of 840433 is 334048.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 840433 - 2⁹ = 839921 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

840433 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (840439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38191 + ... + 38212.

It is an arithmetic number, because the mean of its divisors is an integer number (229212).

2⁸⁴⁰⁴³³ is an apocalyptic number.

It is an amenable number.

840433 is a deficient number, since it is larger than the sum of its proper divisors (76415).

840433 is a wasteful number, since it uses less digits than its factorization.

840433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76414.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 840433 is about 916.7513294236. The cubic root of 840433 is about 94.3700892142.

The spelling of 840433 in words is "eight hundred forty thousand, four hundred thirty-three".