428745 has 16 divisors (see below), whose sum is σ = 695232. Its totient is φ = 225600.

The previous prime is 428741. The next prime is 428759. The reversal of 428745 is 547824.

It is not a de Polignac number, because 428745 - 2² = 428741 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (428741) 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, 1374 + ... + 1656.

It is an arithmetic number, because the mean of its divisors is an integer number (43452).

2⁴²⁸⁷⁴⁵ is an apocalyptic number.

It is an amenable number.

428745 is a deficient number, since it is larger than the sum of its proper divisors (266487).

428745 is a wasteful number, since it uses less digits than its factorization.

428745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392.

The product of its digits is 8960, while the sum is 30.

The square root of 428745 is about 654.7862246566. The cubic root of 428745 is about 75.4049210296.

The spelling of 428745 in words is "four hundred twenty-eight thousand, seven hundred forty-five".