445424509 has 8 divisors (see below), whose sum is σ = 471729600. Its totient is φ = 419697696.

The previous prime is 445424503. The next prime is 445424549. The reversal of 445424509 is 905424544.

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

It is a cyclic number.

It is not a de Polignac number, because 445424509 - 2⁵ = 445424477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (445424503) 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, 142984 + ... + 146065.

It is an arithmetic number, because the mean of its divisors is an integer number (58966200).

Almost surely, 2^445424509 is an apocalyptic number.

It is an amenable number.

445424509 is a deficient number, since it is larger than the sum of its proper divisors (26305091).

445424509 is a wasteful number, since it uses less digits than its factorization.

445424509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289139.

The product of its (nonzero) digits is 115200, while the sum is 37.

The square root of 445424509 is about 21105.0825395211. The cubic root of 445424509 is about 763.7033634778.

The spelling of 445424509 in words is "four hundred forty-five million, four hundred twenty-four thousand, five hundred nine".