442206406 has 8 divisors (see below), whose sum is σ = 672396264. Its totient is φ = 218074320.

The previous prime is 442206343. The next prime is 442206407. The reversal of 442206406 is 604602244.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442206407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1514260 + ... + 1514551.

It is an arithmetic number, because the mean of its divisors is an integer number (84049533).

Almost surely, 2^442206406 is an apocalyptic number.

442206406 is a deficient number, since it is larger than the sum of its proper divisors (230189858).

442206406 is a wasteful number, since it uses less digits than its factorization.

442206406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3028886.

The product of its (nonzero) digits is 9216, while the sum is 28.

The square root of 442206406 is about 21028.7043347896. The cubic root of 442206406 is about 761.8597149685.

The spelling of 442206406 in words is "four hundred forty-two million, two hundred six thousand, four hundred six".