445378816 has 27 divisors (see below), whose sum is σ = 889692391. Its totient is φ = 222520576.

The previous prime is 445378789. The next prime is 445378819. The reversal of 445378816 is 618873544.

It is a happy number.

The square root of 445378816 is 21104.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (445378819) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 337005 + ... + 338323.

Almost surely, 2^445378816 is an apocalyptic number.

445378816 is the 21104-th square number.

It is an amenable number.

445378816 is a deficient number, since it is larger than the sum of its proper divisors (444313575).

445378816 is an frugal number, since it uses more digits than its factorization.

445378816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2654 (or 1321 counting only the distinct ones).

The product of its digits is 645120, while the sum is 46.

The cubic root of 445378816 is about 763.6772482474.

The spelling of 445378816 in words is "four hundred forty-five million, three hundred seventy-eight thousand, eight hundred sixteen".