428945 has 12 divisors (see below), whose sum is σ = 566580. Its totient is φ = 311520.

The previous prime is 428899. The next prime is 428951. The reversal of 428945 is 549824.

It can be written as a sum of positive squares in 2 ways, for example, as 101761 + 327184 = 319^2 + 572^2 .

It is not a de Polignac number, because 428945 - 2¹² = 424849 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 251 + ... + 959.

It is an arithmetic number, because the mean of its divisors is an integer number (47215).

2⁴²⁸⁹⁴⁵ is an apocalyptic number.

It is an amenable number.

428945 is a deficient number, since it is larger than the sum of its proper divisors (137635).

428945 is a wasteful number, since it uses less digits than its factorization.

428945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 736 (or 725 counting only the distinct ones).

The product of its digits is 11520, while the sum is 32.

The square root of 428945 is about 654.9389284506. The cubic root of 428945 is about 75.4166441127.

It can be divided in two parts, 4289 and 45, that added together give a palindrome (4334).

The spelling of 428945 in words is "four hundred twenty-eight thousand, nine hundred forty-five".