442618478 has 8 divisors (see below), whose sum is σ = 666091272. Its totient is φ = 220588056.

The previous prime is 442618441. The next prime is 442618481. The reversal of 442618478 is 874816244.

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

It is a super-2 number, since 2×442618478² = 391822234134072968, which contains 22 as substring.

It is a congruent number.

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, 359825 + ... + 361052.

It is an arithmetic number, because the mean of its divisors is an integer number (83261409).

Almost surely, 2^442618478 is an apocalyptic number.

442618478 is a deficient number, since it is larger than the sum of its proper divisors (223472794).

442618478 is a wasteful number, since it uses less digits than its factorization.

442618478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 721186.

The product of its digits is 344064, while the sum is 44.

The square root of 442618478 is about 21038.4998989947. The cubic root of 442618478 is about 762.0962889506.

The spelling of 442618478 in words is "four hundred forty-two million, six hundred eighteen thousand, four hundred seventy-eight".