442804689 has 6 divisors (see below), whose sum is σ = 639606786. Its totient is φ = 295203120.

The previous prime is 442804657. The next prime is 442804693. The reversal of 442804689 is 986408244.

It can be written as a sum of positive squares in only one way, i.e., 340956225 + 101848464 = 18465^2 + 10092^2 .

It is not a de Polignac number, because 442804689 - 2⁵ = 442804657 is a prime.

It is not an unprimeable number, because it can be changed into a prime (442804619) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 24600252 + ... + 24600269.

It is an arithmetic number, because the mean of its divisors is an integer number (106601131).

Almost surely, 2^442804689 is an apocalyptic number.

It is an amenable number.

442804689 is a deficient number, since it is larger than the sum of its proper divisors (196802097).

442804689 is a wasteful number, since it uses less digits than its factorization.

442804689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49200527 (or 49200524 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 45.

The square root of 442804689 is about 21042.9249155150. The cubic root of 442804689 is about 762.2031460770.

The spelling of 442804689 in words is "four hundred forty-two million, eight hundred four thousand, six hundred eighty-nine".