442323688 has 32 divisors (see below), whose sum is σ = 846675720. Its totient is φ = 216576000.

The previous prime is 442323659. The next prime is 442323701. The reversal of 442323688 is 886323244.

It can be written as a sum of positive squares in 4 ways, for example, as 305480484 + 136843204 = 17478^2 + 11698^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 442323688.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 115728 + ... + 119488.

Almost surely, 2^442323688 is an apocalyptic number.

It is an amenable number.

442323688 is a deficient number, since it is larger than the sum of its proper divisors (404352032).

442323688 is a wasteful number, since it uses less digits than its factorization.

442323688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4069 (or 4065 counting only the distinct ones).

The product of its digits is 221184, while the sum is 40.

The square root of 442323688 is about 21031.4927668009. The cubic root of 442323688 is about 761.9270625025.

The spelling of 442323688 in words is "four hundred forty-two million, three hundred twenty-three thousand, six hundred eighty-eight".