284563 has 8 divisors (see below), whose sum is σ = 317520. Its totient is φ = 253440.

The previous prime is 284561. The next prime is 284573. The reversal of 284563 is 365482.

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

It is a cyclic number.

It is not a de Polignac number, because 284563 - 2¹ = 284561 is a prime.

It is a super-2 number, since 2×284563² = 161952201938, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (284561) 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, 118 + ... + 763.

It is an arithmetic number, because the mean of its divisors is an integer number (39690).

2²⁸⁴⁵⁶³ is an apocalyptic number.

284563 is a deficient number, since it is larger than the sum of its proper divisors (32957).

284563 is a wasteful number, since it uses less digits than its factorization.

284563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 917.

The product of its digits is 5760, while the sum is 28.

The square root of 284563 is about 533.4444675878. Note that the first 4 decimals coincide. The cubic root of 284563 is about 65.7747910196.

The spelling of 284563 in words is "two hundred eighty-four thousand, five hundred sixty-three".