442440450 has 72 divisors (see below), whose sum is σ = 1220862708. Its totient is φ = 114791040.

The previous prime is 442440433. The next prime is 442440457. The reversal of 442440450 is 54044244.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 398840841 + 43599609 = 19971^2 + 6603^2 .

It is not an unprimeable number, because it can be changed into a prime (442440457) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 3364 + ... + 29936.

Almost surely, 2^442440450 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 442440450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (610431354).

442440450 is an abundant number, since it is smaller than the sum of its proper divisors (778422258).

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

442440450 is a wasteful number, since it uses less digits than its factorization.

442440450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26628 (or 26620 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 27.

The square root of 442440450 is about 21034.2684683827. The cubic root of 442440450 is about 761.9940996092.

Adding to 442440450 its reverse (54044244), we get a palindrome (496484694).

The spelling of 442440450 in words is "four hundred forty-two million, four hundred forty thousand, four hundred fifty".