284740 has 24 divisors (see below), whose sum is σ = 624960. Its totient is φ = 108768.

The previous prime is 284737. The next prime is 284741. The reversal of 284740 is 47482.

It is not an unprimeable number, because it can be changed into a prime (284741) 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, 151 + ... + 769.

It is an arithmetic number, because the mean of its divisors is an integer number (26040).

2²⁸⁴⁷⁴⁰ is an apocalyptic number.

284740 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 284740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (312480).

284740 is an abundant number, since it is smaller than the sum of its proper divisors (340220).

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

284740 is a wasteful number, since it uses less digits than its factorization.

284740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 651 (or 649 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 25.

The square root of 284740 is about 533.6103447273. The cubic root of 284740 is about 65.7884256394.

It can be divided in two parts, 284 and 740, that added together give a 10-th power (1024 = 2¹⁰).

The spelling of 284740 in words is "two hundred eighty-four thousand, seven hundred forty".