442630644 has 24 divisors (see below), whose sum is σ = 1033562880. Its totient is φ = 147435264.

The previous prime is 442630637. The next prime is 442630651. The reversal of 442630644 is 446036244.

It is an interprime number because it is at equal distance from previous prime (442630637) and next prime (442630651).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4452 + ... + 30084.

It is an arithmetic number, because the mean of its divisors is an integer number (43065120).

Almost surely, 2^442630644 is an apocalyptic number.

It is an amenable number.

442630644 is an abundant number, since it is smaller than the sum of its proper divisors (590932236).

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

442630644 is a wasteful number, since it uses less digits than its factorization.

442630644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27079 (or 27077 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 33.

The square root of 442630644 is about 21038.7890335922. The cubic root of 442630644 is about 762.1032713210.

Adding to 442630644 its reverse (446036244), we get a palindrome (888666888).

The spelling of 442630644 in words is "four hundred forty-two million, six hundred thirty thousand, six hundred forty-four".