442528807 has 6 divisors (see below), whose sum is σ = 505810824. Its totient is φ = 379262700.

The previous prime is 442528789. The next prime is 442528817. The reversal of 442528807 is 708825244.

It is not a de Polignac number, because 442528807 - 2²³ = 434140199 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 442528807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442528817) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 51682 + ... + 59632.

It is an arithmetic number, because the mean of its divisors is an integer number (84301804).

Almost surely, 2^442528807 is an apocalyptic number.

442528807 is a deficient number, since it is larger than the sum of its proper divisors (63282017).

442528807 is an frugal number, since it uses more digits than its factorization.

442528807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15909 (or 7958 counting only the distinct ones).

The product of its (nonzero) digits is 143360, while the sum is 40.

The square root of 442528807 is about 21036.3686742746. The cubic root of 442528807 is about 762.0448205829.

The spelling of 442528807 in words is "four hundred forty-two million, five hundred twenty-eight thousand, eight hundred seven".