845428 has 12 divisors (see below), whose sum is σ = 1487332. Its totient is φ = 420480.

The previous prime is 845387. The next prime is 845431. The reversal of 845428 is 824548.

It can be written as a sum of positive squares in 2 ways, for example, as 675684 + 169744 = 822^2 + 412^2 .

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 845428.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 526 + ... + 1402.

2⁸⁴⁵⁴²⁸ is an apocalyptic number.

It is an amenable number.

845428 is a deficient number, since it is larger than the sum of its proper divisors (641904).

845428 is a wasteful number, since it uses less digits than its factorization.

845428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1122 (or 1120 counting only the distinct ones).

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

The square root of 845428 is about 919.4715873805. The cubic root of 845428 is about 94.5566786701.

The spelling of 845428 in words is "eight hundred forty-five thousand, four hundred twenty-eight".