445318 has 4 divisors (see below), whose sum is σ = 667980. Its totient is φ = 222658.

The previous prime is 445307. The next prime is 445321. The reversal of 445318 is 813544.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×445318² = 396616242248, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 445292 and 445301.

It is a congruent number.

It is an unprimeable number.

445318 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111328 + ... + 111331.

It is an arithmetic number, because the mean of its divisors is an integer number (166995).

2⁴⁴⁵³¹⁸ is an apocalyptic number.

445318 is a deficient number, since it is larger than the sum of its proper divisors (222662).

445318 is a wasteful number, since it uses less digits than its factorization.

445318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222661.

The product of its digits is 1920, while the sum is 25.

The square root of 445318 is about 667.3215117168. The cubic root of 445318 is about 76.3642486895.

The spelling of 445318 in words is "four hundred forty-five thousand, three hundred eighteen".