284455 has 4 divisors (see below), whose sum is σ = 341352. Its totient is φ = 227560.

The previous prime is 284447. The next prime is 284467. The reversal of 284455 is 554482.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 284455 - 2³ = 284447 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28441 + ... + 28450.

It is an arithmetic number, because the mean of its divisors is an integer number (85338).

2²⁸⁴⁴⁵⁵ is an apocalyptic number.

284455 is a deficient number, since it is larger than the sum of its proper divisors (56897).

284455 is an equidigital number, since it uses as much as digits as its factorization.

284455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56896.

The product of its digits is 6400, while the sum is 28.

The square root of 284455 is about 533.3432290749. The cubic root of 284455 is about 65.7664688129.

The spelling of 284455 in words is "two hundred eighty-four thousand, four hundred fifty-five".