243409438 has 8 divisors (see below), whose sum is σ = 365413032. Its totient is φ = 121605096.

The previous prime is 243409409. The next prime is 243409469. The reversal of 243409438 is 834904342.

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

It is a junction number, because it is equal to n+sod(n) for n = 243409397 and 243409406.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46720 + ... + 51667.

It is an arithmetic number, because the mean of its divisors is an integer number (45676629).

Almost surely, 2^243409438 is an apocalyptic number.

243409438 is a deficient number, since it is larger than the sum of its proper divisors (122003594).

243409438 is a wasteful number, since it uses less digits than its factorization.

243409438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99626.

The product of its (nonzero) digits is 82944, while the sum is 37.

The square root of 243409438 is about 15601.5844708158. The cubic root of 243409438 is about 624.3754298273.

The spelling of 243409438 in words is "two hundred forty-three million, four hundred nine thousand, four hundred thirty-eight".