442423432 has 24 divisors (see below), whose sum is σ = 911814750. Its totient is φ = 201101120.

The previous prime is 442423409. The next prime is 442423439. The reversal of 442423432 is 234324244.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 363817476 + 78605956 = 19074^2 + 8866^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 442423432.

It is not an unprimeable number, because it can be changed into a prime (442423439) 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, 227557 + ... + 229492.

Almost surely, 2^442423432 is an apocalyptic number.

It is an amenable number.

442423432 is an abundant number, since it is smaller than the sum of its proper divisors (469391318).

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

442423432 is a wasteful number, since it uses less digits than its factorization.

442423432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 457077 (or 457062 counting only the distinct ones).

The product of its digits is 18432, while the sum is 28.

The square root of 442423432 is about 21033.8639341420. The cubic root of 442423432 is about 761.9843297205.

Adding to 442423432 its reverse (234324244), we get a palindrome (676747676).

It can be divided in two parts, 44242 and 3432, that added together give a palindrome (47674).

The spelling of 442423432 in words is "four hundred forty-two million, four hundred twenty-three thousand, four hundred thirty-two".