223840389 has 4 divisors (see below), whose sum is σ = 298453856. Its totient is φ = 149226924.

The previous prime is 223840381. The next prime is 223840391. The reversal of 223840389 is 983048322.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 223840389 - 2³ = 223840381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223840381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37306729 + ... + 37306734.

It is an arithmetic number, because the mean of its divisors is an integer number (74613464).

Almost surely, 2^223840389 is an apocalyptic number.

It is an amenable number.

223840389 is a deficient number, since it is larger than the sum of its proper divisors (74613467).

223840389 is an equidigital number, since it uses as much as digits as its factorization.

223840389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74613466.

The product of its (nonzero) digits is 82944, while the sum is 39.

The square root of 223840389 is about 14961.2963676280. The cubic root of 223840389 is about 607.1735121829.

The spelling of 223840389 in words is "two hundred twenty-three million, eight hundred forty thousand, three hundred eighty-nine".