243991468 has 24 divisors (see below), whose sum is σ = 501173792. Its totient is φ = 101741184.

The previous prime is 243991459. The next prime is 243991469. The reversal of 243991468 is 864199342.

It is not an unprimeable number, because it can be changed into a prime (243991469) 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 7 ways as a sum of consecutive naturals, for example, 116721 + ... + 118792.

Almost surely, 2^243991468 is an apocalyptic number.

243991468 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

243991468 is an abundant number, since it is smaller than the sum of its proper divisors (257182324).

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

243991468 is a wasteful number, since it uses less digits than its factorization.

243991468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235561 (or 235559 counting only the distinct ones).

The product of its digits is 373248, while the sum is 46.

The square root of 243991468 is about 15620.2262467610. The cubic root of 243991468 is about 624.8726934306.

The spelling of 243991468 in words is "two hundred forty-three million, nine hundred ninety-one thousand, four hundred sixty-eight".