422655220 has 48 divisors (see below), whose sum is σ = 959107968. Its totient is φ = 155525760.

The previous prime is 422655169. The next prime is 422655253. The reversal of 422655220 is 22556224.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78247 + ... + 83473.

It is an arithmetic number, because the mean of its divisors is an integer number (19981416).

Almost surely, 2^422655220 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 422655220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (479553984).

422655220 is an abundant number, since it is smaller than the sum of its proper divisors (536452748).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

422655220 is a wasteful number, since it uses less digits than its factorization.

422655220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5560 (or 5558 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 28.

The square root of 422655220 is about 20558.5802038954. The cubic root of 422655220 is about 750.4620678585.

The spelling of 422655220 in words is "four hundred twenty-two million, six hundred fifty-five thousand, two hundred twenty".