428773 has 4 divisors (see below), whose sum is σ = 451360. Its totient is φ = 406188.

The previous prime is 428759. The next prime is 428777. The reversal of 428773 is 377824.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 428773 - 2⁵ = 428741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428777) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11265 + ... + 11302.

It is an arithmetic number, because the mean of its divisors is an integer number (112840).

2⁴²⁸⁷⁷³ is an apocalyptic number.

It is an amenable number.

428773 is a deficient number, since it is larger than the sum of its proper divisors (22587).

428773 is a wasteful number, since it uses less digits than its factorization.

428773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22586.

The product of its digits is 9408, while the sum is 31.

The square root of 428773 is about 654.8076053315. The cubic root of 428773 is about 75.4065624807.

The spelling of 428773 in words is "four hundred twenty-eight thousand, seven hundred seventy-three".