442664472 has 16 divisors (see below), whose sum is σ = 1106661240. Its totient is φ = 147554816.

The previous prime is 442664461. The next prime is 442664473. The reversal of 442664472 is 274466244.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 442664472.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442664473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9222153 + ... + 9222200.

Almost surely, 2^442664472 is an apocalyptic number.

It is an amenable number.

442664472 is an abundant number, since it is smaller than the sum of its proper divisors (663996768).

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

442664472 is a wasteful number, since it uses less digits than its factorization.

442664472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18444362 (or 18444358 counting only the distinct ones).

The product of its digits is 258048, while the sum is 39.

The square root of 442664472 is about 21039.5929618422. The cubic root of 442664472 is about 762.1226853803.

The spelling of 442664472 in words is "four hundred forty-two million, six hundred sixty-four thousand, four hundred seventy-two".