442721712 has 30 divisors (see below), whose sum is σ = 1144074468. Its totient is φ = 147525312.

The previous prime is 442721711. The next prime is 442721749. The reversal of 442721712 is 217127244.

It is a self number, because there is not a number n which added to its sum of digits gives 442721712.

It is not an unprimeable number, because it can be changed into a prime (442721711) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 144258 + ... + 147294.

Almost surely, 2^442721712 is an apocalyptic number.

It is an amenable number.

442721712 is an abundant number, since it is smaller than the sum of its proper divisors (701352756).

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

442721712 is an frugal number, since it uses more digits than its factorization.

442721712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6085 (or 3042 counting only the distinct ones).

The product of its digits is 6272, while the sum is 30.

The square root of 442721712 is about 21040.9532103467. The cubic root of 442721712 is about 762.1555334516.

Adding to 442721712 its reverse (217127244), we get a palindrome (659848956).

The spelling of 442721712 in words is "four hundred forty-two million, seven hundred twenty-one thousand, seven hundred twelve".