442424220 has 96 divisors (see below), whose sum is σ = 1420651008. Its totient is φ = 100776192.

The previous prime is 442424197. The next prime is 442424221. The reversal of 442424220 is 22424244.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442424221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 131479 + ... + 134801.

It is an arithmetic number, because the mean of its divisors is an integer number (14798448).

Almost surely, 2^442424220 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 442424220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (710325504).

442424220 is an abundant number, since it is smaller than the sum of its proper divisors (978226788).

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

442424220 is a wasteful number, since it uses less digits than its factorization.

442424220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3659 (or 3657 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 24.

The square root of 442424220 is about 21033.8826658323. The cubic root of 442424220 is about 761.9847821101.

Adding to 442424220 its sum of digits (24), we get a palindrome (442424244).

Adding to 442424220 its reverse (22424244), we get a palindrome (464848464).

The spelling of 442424220 in words is "four hundred forty-two million, four hundred twenty-four thousand, two hundred twenty".