442120216 has 8 divisors (see below), whose sum is σ = 828975420. Its totient is φ = 221060104.

The previous prime is 442120213. The next prime is 442120229. The reversal of 442120216 is 612021244.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442120213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27632506 + ... + 27632521.

Almost surely, 2^442120216 is an apocalyptic number.

It is an amenable number.

442120216 is a deficient number, since it is larger than the sum of its proper divisors (386855204).

442120216 is a wasteful number, since it uses less digits than its factorization.

442120216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55265033 (or 55265029 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 442120216 is about 21026.6548932539. The cubic root of 442120216 is about 761.8102139854.

The spelling of 442120216 in words is "four hundred forty-two million, one hundred twenty thousand, two hundred sixteen".