428106285 has 12 divisors (see below), whose sum is σ = 742050972. Its totient is φ = 228323328.

The previous prime is 428106247. The next prime is 428106307. The reversal of 428106285 is 582601824.

428106285 is a `hidden beast` number, since 4 + 28 + 1 + 0 + 628 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 89472681 + 338633604 = 9459^2 + 18402^2 .

It is not a de Polignac number, because 428106285 - 2¹² = 428102189 is a prime.

It is a Curzon number.

It is a congruent number.

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, 4756692 + ... + 4756781.

It is an arithmetic number, because the mean of its divisors is an integer number (61837581).

Almost surely, 2^428106285 is an apocalyptic number.

428106285 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

428106285 is a deficient number, since it is larger than the sum of its proper divisors (313944687).

428106285 is a wasteful number, since it uses less digits than its factorization.

428106285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9513484 (or 9513481 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 36.

The square root of 428106285 is about 20690.7294458170. The cubic root of 428106285 is about 753.6745805416.

The spelling of 428106285 in words is "four hundred twenty-eight million, one hundred six thousand, two hundred eighty-five".