428865065 has 4 divisors (see below), whose sum is σ = 514638084. Its totient is φ = 343092048.

The previous prime is 428865053. The next prime is 428865077. The reversal of 428865065 is 560568824.

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 (428865053) and next prime (428865077).

It can be written as a sum of positive squares in 2 ways, for example, as 301265449 + 127599616 = 17357^2 + 11296^2 .

It is a cyclic number.

It is not a de Polignac number, because 428865065 - 2¹⁶ = 428799529 is a prime.

It is a Duffinian 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 3 ways as a sum of consecutive naturals, for example, 42886502 + ... + 42886511.

It is an arithmetic number, because the mean of its divisors is an integer number (128659521).

Almost surely, 2^428865065 is an apocalyptic number.

It is an amenable number.

428865065 is a deficient number, since it is larger than the sum of its proper divisors (85773019).

428865065 is an equidigital number, since it uses as much as digits as its factorization.

428865065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85773018.

The product of its (nonzero) digits is 460800, while the sum is 44.

The square root of 428865065 is about 20709.0575594352. The cubic root of 428865065 is about 754.1195912674.

The spelling of 428865065 in words is "four hundred twenty-eight million, eight hundred sixty-five thousand, sixty-five".