445840090 has 8 divisors (see below), whose sum is σ = 802512180. Its totient is φ = 178336032.

The previous prime is 445840063. The next prime is 445840097. The reversal of 445840090 is 90048544.

It can be written as a sum of positive squares in 2 ways, for example, as 431102169 + 14737921 = 20763^2 + 3839^2 .

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

It is not an unprimeable number, because it can be changed into a prime (445840097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22291995 + ... + 22292014.

Almost surely, 2^445840090 is an apocalyptic number.

445840090 is a deficient number, since it is larger than the sum of its proper divisors (356672090).

445840090 is a wasteful number, since it uses less digits than its factorization.

445840090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44584016.

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 445840090 is about 21114.9257635446. The cubic root of 445840090 is about 763.9408013578.

The spelling of 445840090 in words is "four hundred forty-five million, eight hundred forty thousand, ninety".