284540 has 24 divisors (see below), whose sum is σ = 613872. Its totient is φ = 110720.

The previous prime is 284539. The next prime is 284551. The reversal of 284540 is 45482.

284540 is nontrivially palindromic in base 15.

It is a plaindrome in base 16.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 647 + ... + 993.

It is an arithmetic number, because the mean of its divisors is an integer number (25578).

2²⁸⁴⁵⁴⁰ is an apocalyptic number.

284540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 284540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (306936).

284540 is an abundant number, since it is smaller than the sum of its proper divisors (329332).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

284540 is a wasteful number, since it uses less digits than its factorization.

284540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 397 (or 395 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 284540 is about 533.4229091443. The cubic root of 284540 is about 65.7730188743.

The spelling of 284540 in words is "two hundred eighty-four thousand, five hundred forty".