442630642 has 8 divisors (see below), whose sum is σ = 671406300. Its totient is φ = 218828544.

The previous prime is 442630637. The next prime is 442630651. The reversal of 442630642 is 246036244.

It can be written as a sum of positive squares in 2 ways, for example, as 430106121 + 12524521 = 20739^2 + 3539^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×442630642³ (a number of 27 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1243167 + ... + 1243522.

Almost surely, 2^442630642 is an apocalyptic number.

442630642 is a deficient number, since it is larger than the sum of its proper divisors (228775658).

442630642 is a wasteful number, since it uses less digits than its factorization.

442630642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2486780.

The product of its (nonzero) digits is 27648, while the sum is 31.

The square root of 442630642 is about 21038.7889860610. The cubic root of 442630642 is about 762.1032701732.

Adding to 442630642 its reverse (246036244), we get a palindrome (688666886).

The spelling of 442630642 in words is "four hundred forty-two million, six hundred thirty thousand, six hundred forty-two".