442530000 has 400 divisors, whose sum is σ = 1743192000. Its totient is φ = 106560000.

The previous prime is 442529993. The next prime is 442530029. The reversal of 442530000 is 35244.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (400).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 2969926 + ... + 2970074.

It is an arithmetic number, because the mean of its divisors is an integer number (4357980).

Almost surely, 2^442530000 is an apocalyptic number.

442530000 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 442530000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (871596000).

442530000 is an abundant number, since it is smaller than the sum of its proper divisors (1300662000).

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

442530000 is a wasteful number, since it uses less digits than its factorization.

442530000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197 (or 170 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 442530000 is about 21036.3970299099. The cubic root of 442530000 is about 762.0455053735.

Adding to 442530000 its reverse (35244), we get a palindrome (442565244).

The spelling of 442530000 in words is "four hundred forty-two million, five hundred thirty thousand".