223838405 has 16 divisors (see below), whose sum is σ = 325036800. Its totient is φ = 144460032.

The previous prime is 223838401. The next prime is 223838429. The reversal of 223838405 is 504838322.

It is a cyclic number.

It is not a de Polignac number, because 223838405 - 2² = 223838401 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223838401) 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 15 ways as a sum of consecutive naturals, for example, 187505 + ... + 188694.

It is an arithmetic number, because the mean of its divisors is an integer number (20314800).

Almost surely, 2^223838405 is an apocalyptic number.

It is an amenable number.

223838405 is a deficient number, since it is larger than the sum of its proper divisors (101198395).

223838405 is a wasteful number, since it uses less digits than its factorization.

223838405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376228.

The product of its (nonzero) digits is 46080, while the sum is 35.

The square root of 223838405 is about 14961.2300630663. The cubic root of 223838405 is about 607.1717182919.

The spelling of 223838405 in words is "two hundred twenty-three million, eight hundred thirty-eight thousand, four hundred five".