442236630 has 64 divisors (see below), whose sum is σ = 1182532608. Its totient is φ = 104924160.

The previous prime is 442236629. The next prime is 442236637. The reversal of 442236630 is 36632244.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442236637) 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, 1254 + ... + 29766.

It is an arithmetic number, because the mean of its divisors is an integer number (18477072).

Almost surely, 2^442236630 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 442236630, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (591266304).

442236630 is an abundant number, since it is smaller than the sum of its proper divisors (740295978).

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

442236630 is a wasteful number, since it uses less digits than its factorization.

442236630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28581.

The product of its (nonzero) digits is 20736, while the sum is 30.

The square root of 442236630 is about 21029.4229592730. The cubic root of 442236630 is about 761.8770718130.

Adding to 442236630 its reverse (36632244), we get a palindrome (478868874).

The spelling of 442236630 in words is "four hundred forty-two million, two hundred thirty-six thousand, six hundred thirty".