281984285 has 8 divisors (see below), whose sum is σ = 369143136. Its totient is φ = 205079440.

The previous prime is 281984281. The next prime is 281984293. The reversal of 281984285 is 582489182.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 281984285 - 2² = 281984281 is a prime.

It is a super-2 number, since 2×281984285² = 159030273973922450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (281984281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2563439 + ... + 2563548.

It is an arithmetic number, because the mean of its divisors is an integer number (46142892).

Almost surely, 2^281984285 is an apocalyptic number.

It is an amenable number.

281984285 is a deficient number, since it is larger than the sum of its proper divisors (87158851).

281984285 is a wasteful number, since it uses less digits than its factorization.

281984285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5127003.

The product of its digits is 368640, while the sum is 47.

The square root of 281984285 is about 16792.3877099119. The cubic root of 281984285 is about 655.7550370883.

The spelling of 281984285 in words is "two hundred eighty-one million, nine hundred eighty-four thousand, two hundred eighty-five".