220298409 has 6 divisors (see below), whose sum is σ = 318208826. Its totient is φ = 146865600.

The previous prime is 220298387. The next prime is 220298497. The reversal of 220298409 is 904892022.

220298409 is a `hidden beast` number, since 220 + 29 + 8 + 409 = 666.

220298409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 207360000 + 12938409 = 14400^2 + 3597^2 .

It is not a de Polignac number, because 220298409 - 2⁹ = 220297897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220298909) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12238792 + ... + 12238809.

Almost surely, 2^220298409 is an apocalyptic number.

It is an amenable number.

220298409 is a deficient number, since it is larger than the sum of its proper divisors (97910417).

220298409 is a wasteful number, since it uses less digits than its factorization.

220298409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24477607 (or 24477604 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 220298409 is about 14842.4529306985. The cubic root of 220298409 is about 603.9538956154.

The spelling of 220298409 in words is "two hundred twenty million, two hundred ninety-eight thousand, four hundred nine".