243969388 has 24 divisors (see below), whose sum is σ = 468469008. Its totient is φ = 110475456.

The previous prime is 243969377. The next prime is 243969389. The reversal of 243969388 is 883969342.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is not an unprimeable number, because it can be changed into a prime (243969389) 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, 41506 + ... + 47017.

It is an arithmetic number, because the mean of its divisors is an integer number (19519542).

Almost surely, 2^243969388 is an apocalyptic number.

It is an amenable number.

243969388 is a deficient number, since it is larger than the sum of its proper divisors (224499620).

243969388 is a wasteful number, since it uses less digits than its factorization.

243969388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88593 (or 88591 counting only the distinct ones).

The product of its digits is 2239488, while the sum is 52.

The square root of 243969388 is about 15619.5194548360. The cubic root of 243969388 is about 624.8538435839.

The spelling of 243969388 in words is "two hundred forty-three million, nine hundred sixty-nine thousand, three hundred eighty-eight".