442811220 has 24 divisors (see below), whose sum is σ = 1239871584. Its totient is φ = 118082976.

The previous prime is 442811183. The next prime is 442811221. The reversal of 442811220 is 22118244.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442811221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3690034 + ... + 3690153.

It is an arithmetic number, because the mean of its divisors is an integer number (51661316).

Almost surely, 2^442811220 is an apocalyptic number.

It is an amenable number.

442811220 is an abundant number, since it is smaller than the sum of its proper divisors (797060364).

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

442811220 is a wasteful number, since it uses less digits than its factorization.

442811220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7380199 (or 7380197 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 24.

The square root of 442811220 is about 21043.0800977423. The cubic root of 442811220 is about 762.2068933456.

Adding to 442811220 its reverse (22118244), we get a palindrome (464929464).

The spelling of 442811220 in words is "four hundred forty-two million, eight hundred eleven thousand, two hundred twenty".