442972668 has 24 divisors (see below), whose sum is σ = 1043839440. Its totient is φ = 146195200.

The previous prime is 442972661. The next prime is 442972681. The reversal of 442972668 is 866279244.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442972661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 181533 + ... + 183956.

It is an arithmetic number, because the mean of its divisors is an integer number (43493310).

Almost surely, 2^442972668 is an apocalyptic number.

It is an amenable number.

442972668 is an abundant number, since it is smaller than the sum of its proper divisors (600866772).

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

442972668 is a wasteful number, since it uses less digits than its factorization.

442972668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 365597 (or 365595 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 48.

The square root of 442972668 is about 21046.9158785795. The cubic root of 442972668 is about 762.2995150773.

The spelling of 442972668 in words is "four hundred forty-two million, nine hundred seventy-two thousand, six hundred sixty-eight".