284638 has 4 divisors (see below), whose sum is σ = 426960. Its totient is φ = 142318.

The previous prime is 284633. The next prime is 284651. The reversal of 284638 is 836482.

It is a happy number.

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

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (284633) by changing a digit.

284638 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71158 + ... + 71161.

It is an arithmetic number, because the mean of its divisors is an integer number (106740).

2²⁸⁴⁶³⁸ is an apocalyptic number.

284638 is a deficient number, since it is larger than the sum of its proper divisors (142322).

284638 is a wasteful number, since it uses less digits than its factorization.

284638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142321.

The product of its digits is 9216, while the sum is 31.

The square root of 284638 is about 533.5147608080. The cubic root of 284638 is about 65.7805690910.

The spelling of 284638 in words is "two hundred eighty-four thousand, six hundred thirty-eight".