442815919 has 32 divisors (see below), whose sum is σ = 577095680. Its totient is φ = 329951232.

The previous prime is 442815913. The next prime is 442815929. The reversal of 442815919 is 919518244.

It is not a de Polignac number, because 442815919 - 2³ = 442815911 is a prime.

It is a super-2 number, since 2×442815919² = 392171876239629122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442815911) 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 31 ways as a sum of consecutive naturals, for example, 333034 + ... + 334360.

It is an arithmetic number, because the mean of its divisors is an integer number (18034240).

Almost surely, 2^442815919 is an apocalyptic number.

442815919 is a deficient number, since it is larger than the sum of its proper divisors (134279761).

442815919 is a wasteful number, since it uses less digits than its factorization.

442815919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1559.

The product of its digits is 103680, while the sum is 43.

The square root of 442815919 is about 21043.1917493521. The cubic root of 442815919 is about 762.2095894512.

The spelling of 442815919 in words is "four hundred forty-two million, eight hundred fifteen thousand, nine hundred nineteen".