403806 has 32 divisors (see below), whose sum is σ = 903168. Its totient is φ = 119520.

The previous prime is 403787. The next prime is 403817. The reversal of 403806 is 608304.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

403806 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 15 ways as a sum of consecutive naturals, for example, 2335 + ... + 2501.

It is an arithmetic number, because the mean of its divisors is an integer number (28224).

2⁴⁰³⁸⁰⁶ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 403806, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (451584).

403806 is an abundant number, since it is smaller than the sum of its proper divisors (499362).

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

403806 is a wasteful number, since it uses less digits than its factorization.

403806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216.

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

The square root of 403806 is about 635.4573156397. The cubic root of 403806 is about 73.9135830761.

The spelling of 403806 in words is "four hundred three thousand, eight hundred six".