442004424 has 16 divisors (see below), whose sum is σ = 1105011120. Its totient is φ = 147334800.

The previous prime is 442004419. The next prime is 442004461. The reversal of 442004424 is 424400244.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 18416851 = 442004424 / (4 + 4 + 2 + 0 + 0 + 4 + 4 + 2 + 4).

It is a junction number, because it is equal to n+sod(n) for n = 442004394 and 442004403.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9208402 + ... + 9208449.

It is an arithmetic number, because the mean of its divisors is an integer number (69063195).

Almost surely, 2^442004424 is an apocalyptic number.

It is an amenable number.

442004424 is an abundant number, since it is smaller than the sum of its proper divisors (663006696).

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

442004424 is a wasteful number, since it uses less digits than its factorization.

442004424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18416860 (or 18416856 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 24.

The square root of 442004424 is about 21023.9012554759. The cubic root of 442004424 is about 761.7437017359.

Adding to 442004424 its reverse (424400244), we get a palindrome (866404668).

The spelling of 442004424 in words is "four hundred forty-two million, four thousand, four hundred twenty-four".