284969889 has 6 divisors (see below), whose sum is σ = 411623186. Its totient is φ = 189979920.

The previous prime is 284969879. The next prime is 284969947. The reversal of 284969889 is 988969482.

It can be written as a sum of positive squares in only one way, i.e., 154256400 + 130713489 = 12420^2 + 11433^2 .

It is a de Polignac number, because none of the positive numbers 2^k-284969889 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (284969869) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 15831652 + ... + 15831669.

Almost surely, 2^284969889 is an apocalyptic number.

It is an amenable number.

284969889 is a deficient number, since it is larger than the sum of its proper divisors (126653297).

284969889 is a wasteful number, since it uses less digits than its factorization.

284969889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31663327 (or 31663324 counting only the distinct ones).

The product of its digits is 17915904, while the sum is 63.

The square root of 284969889 is about 16881.0511817244. The cubic root of 284969889 is about 658.0612595904.

The spelling of 284969889 in words is "two hundred eighty-four million, nine hundred sixty-nine thousand, eight hundred eighty-nine".