444457646 has 8 divisors (see below), whose sum is σ = 666945360. Its totient is φ = 222142528.

The previous prime is 444457631. The next prime is 444457649. The reversal of 444457646 is 646754444.

It is a happy number.

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

It is a super-2 number, since 2×444457646² = 395085198175722632, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 444457597 and 444457606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (444457649) 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, 36506 + ... + 47133.

It is an arithmetic number, because the mean of its divisors is an integer number (83368170).

Almost surely, 2^444457646 is an apocalyptic number.

444457646 is a deficient number, since it is larger than the sum of its proper divisors (222487714).

444457646 is a wasteful number, since it uses less digits than its factorization.

444457646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86298.

The product of its digits is 1290240, while the sum is 44.

The square root of 444457646 is about 21082.1641678458. The cubic root of 444457646 is about 763.1503842984.

The spelling of 444457646 in words is "four hundred forty-four million, four hundred fifty-seven thousand, six hundred forty-six".