442720089 has 12 divisors (see below), whose sum is σ = 730839616. Its totient is φ = 252982872.

The previous prime is 442720079. The next prime is 442720093. The reversal of 442720089 is 980027244.

442720089 is a `hidden beast` number, since 442 + 7 + 200 + 8 + 9 = 666.

It is not a de Polignac number, because 442720089 - 2⁴ = 442720073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (442720079) 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 11 ways as a sum of consecutive naturals, for example, 3513589 + ... + 3513714.

Almost surely, 2^442720089 is an apocalyptic number.

It is an amenable number.

442720089 is a deficient number, since it is larger than the sum of its proper divisors (288119527).

442720089 is a wasteful number, since it uses less digits than its factorization.

442720089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7027316 (or 7027313 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 442720089 is about 21040.9146426670. The cubic root of 442720089 is about 762.1546021066.

The spelling of 442720089 in words is "four hundred forty-two million, seven hundred twenty thousand, eighty-nine".