243826 has 8 divisors (see below), whose sum is σ = 399024. Its totient is φ = 110820.

The previous prime is 243809. The next prime is 243829. The reversal of 243826 is 628342.

It is a happy number.

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

It is a super-2 number, since 2×243826² = 118902236552, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 243826.

It is not an unprimeable number, because it can be changed into a prime (243829) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5520 + ... + 5563.

It is an arithmetic number, because the mean of its divisors is an integer number (49878).

2²⁴³⁸²⁶ is an apocalyptic number.

243826 is a deficient number, since it is larger than the sum of its proper divisors (155198).

243826 is a wasteful number, since it uses less digits than its factorization.

243826 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11096.

The product of its digits is 2304, while the sum is 25.

The square root of 243826 is about 493.7874036465. The cubic root of 243826 is about 62.4731404587.

The spelling of 243826 in words is "two hundred forty-three thousand, eight hundred twenty-six".