428285789 has 4 divisors (see below), whose sum is σ = 428361756. Its totient is φ = 428209824.

The previous prime is 428285747. The next prime is 428285831. The reversal of 428285789 is 987582824.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (428285747) and next prime (428285831).

It can be written as a sum of positive squares in 2 ways, for example, as 227496889 + 200788900 = 15083^2 + 14170^2 .

It is a cyclic number.

It is not a de Polignac number, because 428285789 - 2¹⁶ = 428220253 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 428285789.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428288789) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 28784 + ... + 41049.

It is an arithmetic number, because the mean of its divisors is an integer number (107090439).

Almost surely, 2^428285789 is an apocalyptic number.

It is an amenable number.

428285789 is a deficient number, since it is larger than the sum of its proper divisors (75967).

428285789 is an equidigital number, since it uses as much as digits as its factorization.

428285789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75966.

The product of its digits is 2580480, while the sum is 53.

The square root of 428285789 is about 20695.0667793076. The cubic root of 428285789 is about 753.7799038398.

The spelling of 428285789 in words is "four hundred twenty-eight million, two hundred eighty-five thousand, seven hundred eighty-nine".