444666406 has 8 divisors (see below), whose sum is σ = 695999664. Its totient is φ = 212666520.

The previous prime is 444666401. The next prime is 444666457. The reversal of 444666406 is 604666444.

It is a happy number.

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 (444666401) 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, 4833285 + ... + 4833376.

It is an arithmetic number, because the mean of its divisors is an integer number (86999958).

Almost surely, 2^444666406 is an apocalyptic number.

444666406 is a gapful number since it is divisible by the number (46) formed by its first and last digit.

444666406 is a deficient number, since it is larger than the sum of its proper divisors (251333258).

444666406 is a wasteful number, since it uses less digits than its factorization.

444666406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9666686.

The product of its (nonzero) digits is 331776, while the sum is 40.

The square root of 444666406 is about 21087.1146912042. The cubic root of 444666406 is about 763.2698485030.

The spelling of 444666406 in words is "four hundred forty-four million, six hundred sixty-six thousand, four hundred six".