442742618 has 8 divisors (see below), whose sum is σ = 664722612. Its totient is φ = 221168416.

The previous prime is 442742557. The next prime is 442742627. The reversal of 442742618 is 816247244.

It can be written as a sum of positive squares in 2 ways, for example, as 415629769 + 27112849 = 20387^2 + 5207^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98705 + ... + 103092.

Almost surely, 2^442742618 is an apocalyptic number.

442742618 is a deficient number, since it is larger than the sum of its proper divisors (221979994).

442742618 is a wasteful number, since it uses less digits than its factorization.

442742618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202896.

The product of its digits is 86016, while the sum is 38.

The square root of 442742618 is about 21041.4499975643. The cubic root of 442742618 is about 762.1675299815.

The spelling of 442742618 in words is "four hundred forty-two million, seven hundred forty-two thousand, six hundred eighteen".