442781871 has 32 divisors (see below), whose sum is σ = 716812800. Its totient is φ = 237479040.

The previous prime is 442781869. The next prime is 442781917. The reversal of 442781871 is 178187244.

It is not a de Polignac number, because 442781871 - 2¹ = 442781869 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442781771) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 38401 + ... + 48581.

It is an arithmetic number, because the mean of its divisors is an integer number (22400400).

Almost surely, 2^442781871 is an apocalyptic number.

442781871 is a deficient number, since it is larger than the sum of its proper divisors (274030929).

442781871 is a wasteful number, since it uses less digits than its factorization.

442781871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10319.

The product of its digits is 100352, while the sum is 42.

The square root of 442781871 is about 21042.3827310502. The cubic root of 442781871 is about 762.1900535853.

The spelling of 442781871 in words is "four hundred forty-two million, seven hundred eighty-one thousand, eight hundred seventy-one".