442878985 has 16 divisors (see below), whose sum is σ = 563398416. Its totient is φ = 333058048.

The previous prime is 442878959. The next prime is 442879009. The reversal of 442878985 is 589878244.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 186622921 + 256256064 = 13661^2 + 16008^2 .

It is a cyclic number.

It is not a de Polignac number, because 442878985 - 2⁷ = 442878857 is a prime.

It is a super-2 number, since 2×442878985² = 392283590709260450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80379 + ... + 85711.

It is an arithmetic number, because the mean of its divisors is an integer number (35212401).

Almost surely, 2^442878985 is an apocalyptic number.

It is an amenable number.

442878985 is a deficient number, since it is larger than the sum of its proper divisors (120519431).

442878985 is a wasteful number, since it uses less digits than its factorization.

442878985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6332.

The product of its digits is 5160960, while the sum is 55.

The square root of 442878985 is about 21044.6901854126. The cubic root of 442878985 is about 762.2457724535.

The spelling of 442878985 in words is "four hundred forty-two million, eight hundred seventy-eight thousand, nine hundred eighty-five".