445389 has 16 divisors (see below), whose sum is σ = 688128. Its totient is φ = 250992.

The previous prime is 445363. The next prime is 445427. The reversal of 445389 is 983544.

It is not a de Polignac number, because 445389 - 2⁷ = 445261 is a prime.

It is a super-2 number, since 2×445389² = 396742722642, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (445339) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2584 + ... + 2750.

It is an arithmetic number, because the mean of its divisors is an integer number (43008).

2⁴⁴⁵³⁸⁹ is an apocalyptic number.

It is an amenable number.

445389 is a deficient number, since it is larger than the sum of its proper divisors (242739).

445389 is a wasteful number, since it uses less digits than its factorization.

445389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304.

The product of its digits is 17280, while the sum is 33.

The square root of 445389 is about 667.3747073421. The cubic root of 445389 is about 76.3683068933.

The spelling of 445389 in words is "four hundred forty-five thousand, three hundred eighty-nine".