442630634 has 4 divisors (see below), whose sum is σ = 663945954. Its totient is φ = 221315316.

The previous prime is 442630619. The next prime is 442630637. The reversal of 442630634 is 436036244.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 286455625 + 156175009 = 16925^2 + 12497^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 442630634.

It is not an unprimeable number, because it can be changed into a prime (442630637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110657657 + ... + 110657660.

Almost surely, 2^442630634 is an apocalyptic number.

442630634 is a deficient number, since it is larger than the sum of its proper divisors (221315320).

442630634 is a wasteful number, since it uses less digits than its factorization.

442630634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221315319.

The product of its (nonzero) digits is 41472, while the sum is 32.

The square root of 442630634 is about 21038.7887959359. The cubic root of 442630634 is about 762.1032655818.

Adding to 442630634 its reverse (436036244), we get a palindrome (878666878).

The spelling of 442630634 in words is "four hundred forty-two million, six hundred thirty thousand, six hundred thirty-four".