442545994 has 8 divisors (see below), whose sum is σ = 724166208. Its totient is φ = 201157260.

The previous prime is 442545979. The next prime is 442546021. The reversal of 442545994 is 499545244.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 10057842 + ... + 10057885.

It is an arithmetic number, because the mean of its divisors is an integer number (90520776).

Almost surely, 2^442545994 is an apocalyptic number.

442545994 is a deficient number, since it is larger than the sum of its proper divisors (281620214).

442545994 is a wasteful number, since it uses less digits than its factorization.

442545994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20115740.

The product of its digits is 1036800, while the sum is 46.

The square root of 442545994 is about 21036.7771771248. Note that the first 3 decimals coincide. The cubic root of 442545994 is about 762.0546859254.

The spelling of 442545994 in words is "four hundred forty-two million, five hundred forty-five thousand, nine hundred ninety-four".