442340140 has 192 divisors, whose sum is σ = 1149603840. Its totient is φ = 141039360.

The previous prime is 442340089. The next prime is 442340141. The reversal of 442340140 is 41043244.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (442340141) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4133967 + ... + 4134073.

It is an arithmetic number, because the mean of its divisors is an integer number (5987520).

Almost surely, 2^442340140 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 442340140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (574801920).

442340140 is an abundant number, since it is smaller than the sum of its proper divisors (707263700).

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

442340140 is a wasteful number, since it uses less digits than its factorization.

442340140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212 (or 210 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 442340140 is about 21031.8838908929. The cubic root of 442340140 is about 761.9365088793.

Adding to 442340140 its reverse (41043244), we get a palindrome (483383384).

The spelling of 442340140 in words is "four hundred forty-two million, three hundred forty thousand, one hundred forty".