806403 has 32 divisors (see below), whose sum is σ = 1290240. Its totient is φ = 443520.

The previous prime is 806389. The next prime is 806447. The reversal of 806403 is 304608.

It is a Cunningham number, because it is equal to 898²-1.

It is not a de Polignac number, because 806403 - 2⁵ = 806371 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 806403.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 806403.

It is not an unprimeable number, because it can be changed into a prime (806453) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25998 + ... + 26028.

It is an arithmetic number, because the mean of its divisors is an integer number (40320).

2⁸⁰⁶⁴⁰³ is an apocalyptic number.

806403 is a deficient number, since it is larger than the sum of its proper divisors (483837).

806403 is a wasteful number, since it uses less digits than its factorization.

806403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 806403 is about 897.9994432070. Note that the first 3 decimals coincide. The cubic root of 806403 is about 93.0787862828.

The spelling of 806403 in words is "eight hundred six thousand, four hundred three".