442533881 has 8 divisors (see below), whose sum is σ = 458740800. Its totient is φ = 426390160.

The previous prime is 442533863. The next prime is 442533893. The reversal of 442533881 is 188335244.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 442533881 - 2¹⁸ = 442271737 is a prime.

It is a super-2 number, since 2×442533881² = 391672471665844322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (442533181) 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, 1301 + ... + 29778.

It is an arithmetic number, because the mean of its divisors is an integer number (57342600).

Almost surely, 2^442533881 is an apocalyptic number.

It is an amenable number.

442533881 is a deficient number, since it is larger than the sum of its proper divisors (16206919).

442533881 is a wasteful number, since it uses less digits than its factorization.

442533881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31599.

The product of its digits is 92160, while the sum is 38.

The square root of 442533881 is about 21036.4892745914. The cubic root of 442533881 is about 762.0477330868.

The spelling of 442533881 in words is "four hundred forty-two million, five hundred thirty-three thousand, eight hundred eighty-one".