243669388 has 12 divisors (see below), whose sum is σ = 430407432. Its totient is φ = 120695840.

The previous prime is 243669353. The next prime is 243669389. The reversal of 243669388 is 883966342.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (243669389) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 284233 + ... + 285088.

It is an arithmetic number, because the mean of its divisors is an integer number (35867286).

Almost surely, 2^243669388 is an apocalyptic number.

It is an amenable number.

243669388 is a deficient number, since it is larger than the sum of its proper divisors (186738044).

243669388 is a wasteful number, since it uses less digits than its factorization.

243669388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 569432 (or 569430 counting only the distinct ones).

The product of its digits is 1492992, while the sum is 49.

The square root of 243669388 is about 15609.9131323656. The cubic root of 243669388 is about 624.5976187585.

It can be divided in two parts, 2436 and 69388, that added together give a square (71824 = 268²).

The spelling of 243669388 in words is "two hundred forty-three million, six hundred sixty-nine thousand, three hundred eighty-eight".