220304440 has 32 divisors (see below), whose sum is σ = 500327280. Its totient is φ = 87296512.

The previous prime is 220304417. The next prime is 220304473. The reversal of 220304440 is 44403022.

It is a congruent number.

It is an unprimeable number.

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, 21457 + ... + 30016.

Almost surely, 2^220304440 is an apocalyptic number.

220304440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220304440 is an abundant number, since it is smaller than the sum of its proper divisors (280022840).

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

220304440 is a wasteful number, since it uses less digits than its factorization.

220304440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51591 (or 51587 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 19.

The square root of 220304440 is about 14842.6560965347. The cubic root of 220304440 is about 603.9594069469.

Adding to 220304440 its reverse (44403022), we get a palindrome (264707462).

The spelling of 220304440 in words is "two hundred twenty million, three hundred four thousand, four hundred forty".