403306 has 4 divisors (see below), whose sum is σ = 604962. Its totient is φ = 201652.

The previous prime is 403301. The next prime is 403309. The reversal of 403306 is 603304.

It is a happy number.

403306 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 403225 + 81 = 635^2 + 9^2 .

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 403306.

It is not an unprimeable number, because it can be changed into a prime (403301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100825 + ... + 100828.

2⁴⁰³³⁰⁶ is an apocalyptic number.

403306 is a deficient number, since it is larger than the sum of its proper divisors (201656).

403306 is a wasteful number, since it uses less digits than its factorization.

403306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201655.

The product of its (nonzero) digits is 216, while the sum is 16.

The square root of 403306 is about 635.0637763249. The cubic root of 403306 is about 73.8830634243.

The spelling of 403306 in words is "four hundred three thousand, three hundred six".