220385 has 8 divisors (see below), whose sum is σ = 288576. Its totient is φ = 160240.

The previous prime is 220373. The next prime is 220391. The reversal of 220385 is 583022.

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

It is not a de Polignac number, because 220385 - 2⁴ = 220369 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a nialpdrome in base 12.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1949 + ... + 2058.

It is an arithmetic number, because the mean of its divisors is an integer number (36072).

2²²⁰³⁸⁵ is an apocalyptic number.

It is an amenable number.

220385 is a deficient number, since it is larger than the sum of its proper divisors (68191).

220385 is a wasteful number, since it uses less digits than its factorization.

220385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4023.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 220385 is about 469.4518079633. The cubic root of 220385 is about 60.4033015753.

The spelling of 220385 in words is "two hundred twenty thousand, three hundred eighty-five".