243700408 has 16 divisors (see below), whose sum is σ = 522215280. Its totient is φ = 104443008.

The previous prime is 243700399. The next prime is 243700409. The reversal of 243700408 is 804007342.

243700408 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243700409) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2175841 + ... + 2175952.

It is an arithmetic number, because the mean of its divisors is an integer number (32638455).

Almost surely, 2^243700408 is an apocalyptic number.

243700408 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

243700408 is an abundant number, since it is smaller than the sum of its proper divisors (278514872).

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

243700408 is a wasteful number, since it uses less digits than its factorization.

243700408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4351806 (or 4351802 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 28.

The square root of 243700408 is about 15610.9067001248. The cubic root of 243700408 is about 624.6241221507.

The spelling of 243700408 in words is "two hundred forty-three million, seven hundred thousand, four hundred eight".