442420044 has 72 divisors (see below), whose sum is σ = 1156302000. Its totient is φ = 131514240.

The previous prime is 442420037. The next prime is 442420051. The reversal of 442420044 is 440024244.

It is an interprime number because it is at equal distance from previous prime (442420037) and next prime (442420051).

It is a junction number, because it is equal to n+sod(n) for n = 442419996 and 442420023.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 74082 + ... + 79830.

It is an arithmetic number, because the mean of its divisors is an integer number (16059750).

Almost surely, 2^442420044 is an apocalyptic number.

442420044 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 442420044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (578151000).

442420044 is an abundant number, since it is smaller than the sum of its proper divisors (713881956).

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

442420044 is a wasteful number, since it uses less digits than its factorization.

442420044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5831 (or 5818 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 24.

The square root of 442420044 is about 21033.7833971922. The cubic root of 442420044 is about 761.9823846687.

Adding to 442420044 its reverse (440024244), we get a palindrome (882444288).

It can be divided in two parts, 4424200 and 44, that added together give a palindrome (4424244).

The spelling of 442420044 in words is "four hundred forty-two million, four hundred twenty thousand, forty-four".