445718290 has 32 divisors (see below), whose sum is σ = 818673840. Its totient is φ = 174680064.

The previous prime is 445718281. The next prime is 445718293. The reversal of 445718290 is 92817544.

It can be written as a sum of positive squares in 8 ways, for example, as 210801361 + 234916929 = 14519^2 + 15327^2 .

It is not an unprimeable number, because it can be changed into a prime (445718293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 112666 + ... + 116554.

Almost surely, 2^445718290 is an apocalyptic number.

445718290 is a deficient number, since it is larger than the sum of its proper divisors (372955550).

445718290 is a wasteful number, since it uses less digits than its factorization.

445718290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4126.

The product of its (nonzero) digits is 80640, while the sum is 40.

The square root of 445718290 is about 21112.0413508500. The cubic root of 445718290 is about 763.8712274856.

The spelling of 445718290 in words is "four hundred forty-five million, seven hundred eighteen thousand, two hundred ninety".