442240220 has 48 divisors (see below), whose sum is σ = 939106560. Its totient is φ = 174928896.

The previous prime is 442240189. The next prime is 442240229. The reversal of 442240220 is 22042244.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 442240192 and 442240201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442240229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1021124 + ... + 1021556.

It is an arithmetic number, because the mean of its divisors is an integer number (19564720).

Almost surely, 2^442240220 is an apocalyptic number.

It is an amenable number.

442240220 is an abundant number, since it is smaller than the sum of its proper divisors (496866340).

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

442240220 is a wasteful number, since it uses less digits than its factorization.

442240220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 894 (or 892 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 20.

The square root of 442240220 is about 21029.5083156977. The cubic root of 442240220 is about 761.8791334026.

Adding to 442240220 its reverse (22042244), we get a palindrome (464282464).

The spelling of 442240220 in words is "four hundred forty-two million, two hundred forty thousand, two hundred twenty".