220438709 has 8 divisors (see below), whose sum is σ = 222378432. Its totient is φ = 218505600.

The previous prime is 220438697. The next prime is 220438781. The reversal of 220438709 is 907834022.

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

It is a cyclic number.

It is not a de Polignac number, because 220438709 - 2⁸ = 220438453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220437709) 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, 83717 + ... + 86309.

It is an arithmetic number, because the mean of its divisors is an integer number (27797304).

Almost surely, 2^220438709 is an apocalyptic number.

It is an amenable number.

220438709 is a deficient number, since it is larger than the sum of its proper divisors (1939723).

220438709 is a wasteful number, since it uses less digits than its factorization.

220438709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3307.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 220438709 is about 14847.1784861636. The cubic root of 220438709 is about 604.0820804567.

The spelling of 220438709 in words is "two hundred twenty million, four hundred thirty-eight thousand, seven hundred nine".