442686361 has 8 divisors (see below), whose sum is σ = 479375624. Its totient is φ = 406373760.

The previous prime is 442686347. The next prime is 442686367. The reversal of 442686361 is 163686244.

It can be written as a sum of positive squares in 4 ways, for example, as 4579600 + 438106761 = 2140^2 + 20931^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 442686361 - 2⁵ = 442686329 is a prime.

It is not an unprimeable number, because it can be changed into a prime (442686367) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91716 + ... + 96421.

It is an arithmetic number, because the mean of its divisors is an integer number (59921953).

Almost surely, 2^442686361 is an apocalyptic number.

It is an amenable number.

442686361 is a deficient number, since it is larger than the sum of its proper divisors (36689263).

442686361 is a wasteful number, since it uses less digits than its factorization.

442686361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188331.

The product of its digits is 165888, while the sum is 40.

The square root of 442686361 is about 21040.1131413308. The cubic root of 442686361 is about 762.1352470605.

The spelling of 442686361 in words is "four hundred forty-two million, six hundred eighty-six thousand, three hundred sixty-one".