220447409 has 8 divisors (see below), whose sum is σ = 271320000. Its totient is φ = 174419856.

The previous prime is 220447399. The next prime is 220447421. The reversal of 220447409 is 904744022.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 220447409 - 2¹² = 220443313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (220447429) 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 7 ways as a sum of consecutive naturals, for example, 1211159 + ... + 1211340.

It is an arithmetic number, because the mean of its divisors is an integer number (33915000).

Almost surely, 2^220447409 is an apocalyptic number.

It is an amenable number.

220447409 is a deficient number, since it is larger than the sum of its proper divisors (50872591).

220447409 is a wasteful number, since it uses less digits than its factorization.

220447409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2422519.

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 220447409 is about 14847.4714682332. The cubic root of 220447409 is about 604.0900274048.

The spelling of 220447409 in words is "two hundred twenty million, four hundred forty-seven thousand, four hundred nine".