428407285 has 24 divisors (see below), whose sum is σ = 539300520. Its totient is φ = 326312448.

The previous prime is 428407279. The next prime is 428407297. The reversal of 428407285 is 582704824.

It can be written as a sum of positive squares in 12 ways, for example, as 203946961 + 224460324 = 14281^2 + 14982^2 .

It is not a de Polignac number, because 428407285 - 2³ = 428407277 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1148359 + ... + 1148731.

It is an arithmetic number, because the mean of its divisors is an integer number (22470855).

Almost surely, 2^428407285 is an apocalyptic number.

It is an amenable number.

428407285 is a deficient number, since it is larger than the sum of its proper divisors (110893235).

428407285 is an equidigital number, since it uses as much as digits as its factorization.

428407285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 585 (or 496 counting only the distinct ones).

The product of its (nonzero) digits is 143360, while the sum is 40.

The square root of 428407285 is about 20698.0019567107. The cubic root of 428407285 is about 753.8511744625.

The spelling of 428407285 in words is "four hundred twenty-eight million, four hundred seven thousand, two hundred eighty-five".