442220212 has 48 divisors (see below), whose sum is σ = 934496640. Its totient is φ = 178872192.

The previous prime is 442220209. The next prime is 442220267. The reversal of 442220212 is 212022244.

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

It is a self number, because there is not a number n which added to its sum of digits gives 442220212.

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, 154458 + ... + 157294.

It is an arithmetic number, because the mean of its divisors is an integer number (19468680).

Almost surely, 2^442220212 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 442220212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (467248320).

442220212 is an abundant number, since it is smaller than the sum of its proper divisors (492276428).

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

442220212 is a wasteful number, since it uses less digits than its factorization.

442220212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3160 (or 3158 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 442220212 is about 21029.0325978158. The cubic root of 442220212 is about 761.8676434876.

Adding to 442220212 its reverse (212022244), we get a palindrome (654242456).

The spelling of 442220212 in words is "four hundred forty-two million, two hundred twenty thousand, two hundred twelve".