220438 has 8 divisors (see below), whose sum is σ = 348120. Its totient is φ = 104400.

The previous prime is 220421. The next prime is 220447. The reversal of 220438 is 834022.

It is a happy number.

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

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2863 + ... + 2938.

It is an arithmetic number, because the mean of its divisors is an integer number (43515).

2²²⁰⁴³⁸ is an apocalyptic number.

220438 is a deficient number, since it is larger than the sum of its proper divisors (127682).

220438 is a wasteful number, since it uses less digits than its factorization.

220438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5822.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 220438 is about 469.5082533886. The cubic root of 220438 is about 60.4081432817.

The spelling of 220438 in words is "two hundred twenty thousand, four hundred thirty-eight".