284643849 has 24 divisors (see below), whose sum is σ = 445827648. Its totient is φ = 158241600.

The previous prime is 284643841. The next prime is 284643857. The reversal of 284643849 is 948346482.

It is an interprime number because it is at equal distance from previous prime (284643841) and next prime (284643857).

It is not a de Polignac number, because 284643849 - 2³ = 284643841 is a prime.

It is a super-3 number, since 3×284643849³ (a number of 26 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 284643798 and 284643807.

It is not an unprimeable number, because it can be changed into a prime (284643841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23799 + ... + 33699.

It is an arithmetic number, because the mean of its divisors is an integer number (18576152).

Almost surely, 2^284643849 is an apocalyptic number.

It is an amenable number.

284643849 is a deficient number, since it is larger than the sum of its proper divisors (161183799).

284643849 is an equidigital number, since it uses as much as digits as its factorization.

284643849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9985 (or 9948 counting only the distinct ones).

The product of its digits is 1327104, while the sum is 48.

The square root of 284643849 is about 16871.3914363931. The cubic root of 284643849 is about 657.8101966082.

The spelling of 284643849 in words is "two hundred eighty-four million, six hundred forty-three thousand, eight hundred forty-nine".