243968445 has 96 divisors (see below), whose sum is σ = 529701120. Its totient is φ = 101283840.

The previous prime is 243968441. The next prime is 243968447. The reversal of 243968445 is 544869342.

It is not a de Polignac number, because 243968445 - 2² = 243968441 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 243968445.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243968441) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 154510 + ... + 156080.

It is an arithmetic number, because the mean of its divisors is an integer number (5517720).

Almost surely, 2^243968445 is an apocalyptic number.

It is an amenable number.

243968445 is an abundant number, since it is smaller than the sum of its proper divisors (285732675).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

243968445 is a wasteful number, since it uses less digits than its factorization.

243968445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1635 (or 1632 counting only the distinct ones).

The product of its digits is 829440, while the sum is 45.

The square root of 243968445 is about 15619.4892682187. The cubic root of 243968445 is about 624.8530385131.

The spelling of 243968445 in words is "two hundred forty-three million, nine hundred sixty-eight thousand, four hundred forty-five".