442132220 has 24 divisors (see below), whose sum is σ = 968847264. Its totient is φ = 169163456.

The previous prime is 442132211. The next prime is 442132237. The reversal of 442132220 is 22231244.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 442132192 and 442132201.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 480119 + ... + 481038.

It is an arithmetic number, because the mean of its divisors is an integer number (40368636).

Almost surely, 2^442132220 is an apocalyptic number.

It is an amenable number.

442132220 is an abundant number, since it is smaller than the sum of its proper divisors (526715044).

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

442132220 is a wasteful number, since it uses less digits than its factorization.

442132220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 961189 (or 961187 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 442132220 is about 21026.9403385276. The cubic root of 442132220 is about 761.8171085559.

Adding to 442132220 its reverse (22231244), we get a palindrome (464363464).

The spelling of 442132220 in words is "four hundred forty-two million, one hundred thirty-two thousand, two hundred twenty".