445472644 has 12 divisors (see below), whose sum is σ = 783496000. Its totient is φ = 221616648.

The previous prime is 445472639. The next prime is 445472653. The reversal of 445472644 is 446274544.

It is a junction number, because it is equal to n+sod(n) for n = 445472597 and 445472606.

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, 279024 + ... + 280615.

Almost surely, 2^445472644 is an apocalyptic number.

It is an amenable number.

445472644 is a deficient number, since it is larger than the sum of its proper divisors (338023356).

445472644 is a wasteful number, since it uses less digits than its factorization.

445472644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 559842 (or 559840 counting only the distinct ones).

The product of its digits is 430080, while the sum is 40.

The square root of 445472644 is about 21106.2228738351. Note that the first 3 decimals coincide. The cubic root of 445472644 is about 763.7308724695.

The spelling of 445472644 in words is "four hundred forty-five million, four hundred seventy-two thousand, six hundred forty-four".