284090 has 8 divisors (see below), whose sum is σ = 511380. Its totient is φ = 113632.

The previous prime is 284083. The next prime is 284093. The reversal of 284090 is 90482.

284090 is nontrivially palindromic in base 15.

It is a Cunningham number, because it is equal to 533²+1.

It can be written as a sum of positive squares in 2 ways, for example, as 284089 + 1 = 533^2 + 1^2 .

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

It is not an unprimeable number, because it can be changed into a prime (284093) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14195 + ... + 14214.

2²⁸⁴⁰⁹⁰ is an apocalyptic number.

284090 is a deficient number, since it is larger than the sum of its proper divisors (227290).

284090 is a wasteful number, since it uses less digits than its factorization.

284090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28416.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 284090 is about 533.0009380855. Note that the first 3 decimals coincide. The cubic root of 284090 is about 65.7383272372.

The spelling of 284090 in words is "two hundred eighty-four thousand, ninety".