442985590 has 16 divisors (see below), whose sum is σ = 797630400. Its totient is φ = 177137280.

The previous prime is 442985581. The next prime is 442985597. The reversal of 442985590 is 95589244.

It is a self number, because there is not a number n which added to its sum of digits gives 442985590.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442985597) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 41086 + ... + 50734.

It is an arithmetic number, because the mean of its divisors is an integer number (49851900).

Almost surely, 2^442985590 is an apocalyptic number.

442985590 is a deficient number, since it is larger than the sum of its proper divisors (354644810).

442985590 is a wasteful number, since it uses less digits than its factorization.

442985590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14247.

The product of its (nonzero) digits is 518400, while the sum is 46.

The square root of 442985590 is about 21047.2228571847. Note that the first 3 decimals coincide. The cubic root of 442985590 is about 762.3069273771.

The spelling of 442985590 in words is "four hundred forty-two million, nine hundred eighty-five thousand, five hundred ninety".