840463 has 8 divisors (see below), whose sum is σ = 958608. Its totient is φ = 729984.

The previous prime is 840457. The next prime is 840467. The reversal of 840463 is 364048.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-840463 is a prime.

It is a Duffinian number.

840463 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (840467) 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 7 ways as a sum of consecutive naturals, for example, 1681 + ... + 2122.

It is an arithmetic number, because the mean of its divisors is an integer number (119826).

2⁸⁴⁰⁴⁶³ is an apocalyptic number.

840463 is a deficient number, since it is larger than the sum of its proper divisors (118145).

840463 is a wasteful number, since it uses less digits than its factorization.

840463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3833.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 840463 is about 916.7676914028. The cubic root of 840463 is about 94.3712120755.

The spelling of 840463 in words is "eight hundred forty thousand, four hundred sixty-three".