442687860 has 72 divisors (see below), whose sum is σ = 1347362016. Its totient is φ = 117650880.

The previous prime is 442687849. The next prime is 442687867. The reversal of 442687860 is 68786244.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442687867) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 51255 + ... + 59265.

Almost surely, 2^442687860 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 442687860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (673681008).

442687860 is an abundant number, since it is smaller than the sum of its proper divisors (904674156).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

442687860 is a wasteful number, since it uses less digits than its factorization.

442687860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8333 (or 8328 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 45.

The square root of 442687860 is about 21040.1487637326. The cubic root of 442687860 is about 762.1361072929.

The spelling of 442687860 in words is "four hundred forty-two million, six hundred eighty-seven thousand, eight hundred sixty".