220400304 has 40 divisors (see below), whose sum is σ = 599336640. Its totient is φ = 69599808.

The previous prime is 220400293. The next prime is 220400309. The reversal of 220400304 is 403004022.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (220400309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 119922 + ... + 121745.

It is an arithmetic number, because the mean of its divisors is an integer number (14983416).

Almost surely, 2^220400304 is an apocalyptic number.

220400304 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

220400304 is an abundant number, since it is smaller than the sum of its proper divisors (378936336).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

220400304 is a wasteful number, since it uses less digits than its factorization.

220400304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241697 (or 241691 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 15.

The square root of 220400304 is about 14845.8850864474. The cubic root of 220400304 is about 604.0469972056.

Adding to 220400304 its reverse (403004022), we get a palindrome (623404326).

The spelling of 220400304 in words is "two hundred twenty million, four hundred thousand, three hundred four".