442079289 has 20 divisors (see below), whose sum is σ = 695149840. Its totient is φ = 279207000.

The previous prime is 442079243. The next prime is 442079291. The reversal of 442079289 is 982970244.

It is not a de Polignac number, because 442079289 - 2¹⁷ = 441948217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (442079089) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 142087 + ... + 145164.

It is an arithmetic number, because the mean of its divisors is an integer number (34757492).

Almost surely, 2^442079289 is an apocalyptic number.

It is an amenable number.

442079289 is a deficient number, since it is larger than the sum of its proper divisors (253070551).

442079289 is a wasteful number, since it uses less digits than its factorization.

442079289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287282 (or 287273 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 442079289 is about 21025.6816536349. The cubic root of 442079289 is about 761.7867063755.

The spelling of 442079289 in words is "four hundred forty-two million, seventy-nine thousand, two hundred eighty-nine".