243669390 has 32 divisors (see below), whose sum is σ = 598409856. Its totient is φ = 63467040.

The previous prime is 243669389. The next prime is 243669409. The reversal of 243669390 is 93966342.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 93156 + ... + 95735.

It is an arithmetic number, because the mean of its divisors is an integer number (18700308).

Almost surely, 2^243669390 is an apocalyptic number.

243669390 is an abundant number, since it is smaller than the sum of its proper divisors (354740466).

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

243669390 is a wasteful number, since it uses less digits than its factorization.

243669390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188944.

The product of its (nonzero) digits is 209952, while the sum is 42.

The square root of 243669390 is about 15609.9131964275. The cubic root of 243669390 is about 624.5976204674.

The spelling of 243669390 in words is "two hundred forty-three million, six hundred sixty-nine thousand, three hundred ninety".