442660331 has 8 divisors (see below), whose sum is σ = 474347664. Its totient is φ = 411600640.

The previous prime is 442660243. The next prime is 442660349. The reversal of 442660331 is 133066244.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-442660331 is a prime.

It is a super-2 number, since 2×442660331² = 391896337282059122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 442660294 and 442660303.

It is not an unprimeable number, because it can be changed into a prime (442665331) 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 7 ways as a sum of consecutive naturals, for example, 155450 + ... + 158271.

It is an arithmetic number, because the mean of its divisors is an integer number (59293458).

Almost surely, 2^442660331 is an apocalyptic number.

442660331 is a deficient number, since it is larger than the sum of its proper divisors (31687333).

442660331 is a wasteful number, since it uses less digits than its factorization.

442660331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313821.

The product of its (nonzero) digits is 10368, while the sum is 29.

The square root of 442660331 is about 21039.4945519136. The cubic root of 442660331 is about 762.1203088928.

The spelling of 442660331 in words is "four hundred forty-two million, six hundred sixty thousand, three hundred thirty-one".