284128965 has 24 divisors (see below), whose sum is σ = 510732768. Its totient is φ = 151534800.

The previous prime is 284128931. The next prime is 284128967. The reversal of 284128965 is 569821482.

It is not a de Polignac number, because 284128965 - 2¹³ = 284120773 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 284128965.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (284128967) 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 23 ways as a sum of consecutive naturals, for example, 115711 + ... + 118140.

It is an arithmetic number, because the mean of its divisors is an integer number (21280532).

Almost surely, 2^284128965 is an apocalyptic number.

It is an amenable number.

284128965 is a deficient number, since it is larger than the sum of its proper divisors (226603803).

284128965 is an equidigital number, since it uses as much as digits as its factorization.

284128965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233871 (or 233859 counting only the distinct ones).

The product of its digits is 276480, while the sum is 45.

The square root of 284128965 is about 16856.1254444786. The cubic root of 284128965 is about 657.4133259562.

The spelling of 284128965 in words is "two hundred eighty-four million, one hundred twenty-eight thousand, nine hundred sixty-five".