442979811 has 12 divisors (see below), whose sum is σ = 640215888. Its totient is φ = 295155504.

The previous prime is 442979809. The next prime is 442979819. The reversal of 442979811 is 118979244.

It is a happy number.

It is not a de Polignac number, because 442979811 - 2¹ = 442979809 is a prime.

It is a super-2 number, since 2×442979811² = 392462225907191442, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (442979819) 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 11 ways as a sum of consecutive naturals, for example, 4666 + ... + 30128.

It is an arithmetic number, because the mean of its divisors is an integer number (53351324).

Almost surely, 2^442979811 is an apocalyptic number.

442979811 is a deficient number, since it is larger than the sum of its proper divisors (197236077).

442979811 is a wasteful number, since it uses less digits than its factorization.

442979811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27402 (or 27399 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The square root of 442979811 is about 21047.0855702161. The cubic root of 442979811 is about 762.3036124529.

The spelling of 442979811 in words is "four hundred forty-two million, nine hundred seventy-nine thousand, eight hundred eleven".