220618449 has 12 divisors (see below), whose sum is σ = 321957636. Its totient is φ = 145562112.

The previous prime is 220618429. The next prime is 220618459. The reversal of 220618449 is 944816022.

220618449 is a `hidden beast` number, since 2 + 206 + 1 + 8 + 449 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 113806224 + 106812225 = 10668^2 + 10335^2 .

It is not a de Polignac number, because 220618449 - 2¹² = 220614353 is a prime.

It is not an unprimeable number, because it can be changed into a prime (220618429) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 125484 + ... + 127229.

It is an arithmetic number, because the mean of its divisors is an integer number (26829803).

Almost surely, 2^220618449 is an apocalyptic number.

It is an amenable number.

220618449 is a deficient number, since it is larger than the sum of its proper divisors (101339187).

220618449 is a wasteful number, since it uses less digits than its factorization.

220618449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252816 (or 252813 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 220618449 is about 14853.2302547291. The cubic root of 220618449 is about 604.2462201345.

The spelling of 220618449 in words is "two hundred twenty million, six hundred eighteen thousand, four hundred forty-nine".