405224018 has 16 divisors (see below), whose sum is σ = 629570880. Its totient is φ = 195384336.

The previous prime is 405223993. The next prime is 405224041. The reversal of 405224018 is 810422504.

It is a happy number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 48755 + ... + 56457.

It is an arithmetic number, because the mean of its divisors is an integer number (39348180).

Almost surely, 2^405224018 is an apocalyptic number.

405224018 is a deficient number, since it is larger than the sum of its proper divisors (224346862).

405224018 is a wasteful number, since it uses less digits than its factorization.

405224018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8641.

The product of its (nonzero) digits is 2560, while the sum is 26.

The square root of 405224018 is about 20130.1768000184. The cubic root of 405224018 is about 740.0000109569. Note that the first 4 decimals are identical.

The spelling of 405224018 in words is "four hundred five million, two hundred twenty-four thousand, eighteen".