445716778 has 16 divisors (see below), whose sum is σ = 762357960. Its totient is φ = 193614336.

The previous prime is 445716773. The next prime is 445716779. The reversal of 445716778 is 877617544.

It can be written as a sum of positive squares in 4 ways, for example, as 433347489 + 12369289 = 20817^2 + 3517^2 .

It is not an unprimeable number, because it can be changed into a prime (445716773) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 503763 + ... + 504646.

Almost surely, 2^445716778 is an apocalyptic number.

445716778 is a deficient number, since it is larger than the sum of its proper divisors (316641182).

445716778 is a wasteful number, since it uses less digits than its factorization.

445716778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1008441.

The product of its digits is 1317120, while the sum is 49.

The square root of 445716778 is about 21112.0055418712. The cubic root of 445716778 is about 763.8703637303.

The spelling of 445716778 in words is "four hundred forty-five million, seven hundred sixteen thousand, seven hundred seventy-eight".