442143324 has 72 divisors (see below), whose sum is σ = 1292753280. Its totient is φ = 124798752.

The previous prime is 442143307. The next prime is 442143347. The reversal of 442143324 is 423341244.

It is a happy number.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

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, 10347 + ... + 31485.

Almost surely, 2^442143324 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 442143324, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (646376640).

442143324 is an abundant number, since it is smaller than the sum of its proper divisors (850609956).

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

442143324 is a wasteful number, since it uses less digits than its factorization.

442143324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21239 (or 21234 counting only the distinct ones).

The product of its digits is 9216, while the sum is 27.

The square root of 442143324 is about 21027.2043790895. The cubic root of 442143324 is about 761.8234860949.

Adding to 442143324 its reverse (423341244), we get a palindrome (865484568).

The spelling of 442143324 in words is "four hundred forty-two million, one hundred forty-three thousand, three hundred twenty-four".