428403 has 8 divisors (see below), whose sum is σ = 580816. Its totient is φ = 280800.

The previous prime is 428401. The next prime is 428411. The reversal of 428403 is 304824.

It is a happy number.

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

It is not a de Polignac number, because 428403 - 2¹ = 428401 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 428403.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 428403.

It is not an unprimeable number, because it can be changed into a prime (428401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 988 + ... + 1353.

It is an arithmetic number, because the mean of its divisors is an integer number (72602).

2⁴²⁸⁴⁰³ is an apocalyptic number.

428403 is a deficient number, since it is larger than the sum of its proper divisors (152413).

428403 is a wasteful number, since it uses less digits than its factorization.

428403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2405.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 428403 is about 654.5250186204. The cubic root of 428403 is about 75.3848661073.

The spelling of 428403 in words is "four hundred twenty-eight thousand, four hundred three".