442240542 has 48 divisors (see below), whose sum is σ = 1016421120. Its totient is φ = 138574800.

The previous prime is 442240541. The next prime is 442240553. The reversal of 442240542 is 245042244.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442240541) 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, 39867 + ... + 49737.

It is an arithmetic number, because the mean of its divisors is an integer number (21175440).

Almost surely, 2^442240542 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 442240542, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (508210560).

442240542 is an abundant number, since it is smaller than the sum of its proper divisors (574180578).

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

442240542 is a wasteful number, since it uses less digits than its factorization.

442240542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10029 (or 10026 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 27.

The square root of 442240542 is about 21029.5159716052. The cubic root of 442240542 is about 761.8793183134.

Adding to 442240542 its reverse (245042244), we get a palindrome (687282786).

The spelling of 442240542 in words is "four hundred forty-two million, two hundred forty thousand, five hundred forty-two".