428845 has 8 divisors (see below), whose sum is σ = 518400. Its totient is φ = 340560.

The previous prime is 428843. The next prime is 428851. The reversal of 428845 is 548824.

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

It is not a de Polignac number, because 428845 - 2¹ = 428843 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428843) 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, 780 + ... + 1210.

It is an arithmetic number, because the mean of its divisors is an integer number (64800).

2⁴²⁸⁸⁴⁵ is an apocalyptic number.

It is an amenable number.

428845 is a deficient number, since it is larger than the sum of its proper divisors (89555).

428845 is a wasteful number, since it uses less digits than its factorization.

428845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 635.

The product of its digits is 10240, while the sum is 31.

The square root of 428845 is about 654.8625810046. The cubic root of 428845 is about 75.4107830268.

The spelling of 428845 in words is "four hundred twenty-eight thousand, eight hundred forty-five".