404220530 has 32 divisors (see below), whose sum is σ = 832239360. Its totient is φ = 138473280.

The previous prime is 404220529. The next prime is 404220547. The reversal of 404220530 is 35022404.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 143435 + ... + 146225.

It is an arithmetic number, because the mean of its divisors is an integer number (26007480).

Almost surely, 2^404220530 is an apocalyptic number.

404220530 is an abundant number, since it is smaller than the sum of its proper divisors (428018830).

404220530 is a wasteful number, since it uses less digits than its factorization.

404220530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4874.

The product of its (nonzero) digits is 960, while the sum is 20.

The square root of 404220530 is about 20105.2363825945. The cubic root of 404220530 is about 739.3886660273.

Adding to 404220530 its reverse (35022404), we get a palindrome (439242934).

The spelling of 404220530 in words is "four hundred four million, two hundred twenty thousand, five hundred thirty".