442523432 has 64 divisors (see below), whose sum is σ = 912912000. Its totient is φ = 199874304.

The previous prime is 442523429. The next prime is 442523437. The reversal of 442523432 is 234325244.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 442523395 and 442523404.

It is not an unprimeable number, because it can be changed into a prime (442523437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1167419 + ... + 1167797.

It is an arithmetic number, because the mean of its divisors is an integer number (14264250).

Almost surely, 2^442523432 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 442523432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (456456000).

442523432 is an abundant number, since it is smaller than the sum of its proper divisors (470388568).

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

442523432 is a wasteful number, since it uses less digits than its factorization.

442523432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 610 (or 606 counting only the distinct ones).

The product of its digits is 23040, while the sum is 29.

The square root of 442523432 is about 21036.2409189475. The cubic root of 442523432 is about 762.0417352790.

Adding to 442523432 its reverse (234325244), we get a palindrome (676848676).

The spelling of 442523432 in words is "four hundred forty-two million, five hundred twenty-three thousand, four hundred thirty-two".