403407 has 16 divisors (see below), whose sum is σ = 609280. Its totient is φ = 263736.

The previous prime is 403391. The next prime is 403433. The reversal of 403407 is 704304.

It is not a de Polignac number, because 403407 - 2⁴ = 403391 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 403407.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 403407.

It is not an unprimeable number, because it can be changed into a prime (403607) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1698 + ... + 1920.

It is an arithmetic number, because the mean of its divisors is an integer number (38080).

2⁴⁰³⁴⁰⁷ is an apocalyptic number.

403407 is the 402-nd heptagonal number.

403407 is a deficient number, since it is larger than the sum of its proper divisors (205873).

403407 is a wasteful number, since it uses less digits than its factorization.

403407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299 (or 293 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 18.

The square root of 403407 is about 635.1432909195. The cubic root of 403407 is about 73.8892304262.

The spelling of 403407 in words is "four hundred three thousand, four hundred seven", and thus it is an iban number.